| Action hero's underwater breathing aid | 42 |
| Action in this puzzle's card game | 37 |
| Action may make him laugh or cry? | 33 |
| Action onstage during an ovation | 32 |
| Action required by some treaties | 32 |
| Action scene in "True Blood"? | 39 |
| Action shots taken with a slow shutter speed | 44 |
| Action star in "Above the Law" | 40 |
| Action star who served in the U.S. Air Force | 44 |
| Action star with no stunt double | 32 |
| Action taken by Jessica and Lorenzo | 35 |
| Action taken to improve a colleague's day | 45 |
| Action that can lead to feeling bushed? | 39 |
| Action that is a synonym of its reverse spelling | 48 |
| Action that may cause future problems | 37 |
| Action that may produce a reaction | 34 |
| Action that'll cost you, in poker | 37 |
| Action that's supposedly contagious | 39 |
| Action to a newborn baby's bottom | 37 |
| Action to stimulate the economy? | 32 |
| Action verb that's also a Roman numeral | 43 |
| Action with a good chance of success | 36 |
| Action with the highest chance of success | 41 |
| Actions on heartstrings and pant legs | 37 |
| Activate a dispenser for a fruit drink? | 39 |
| Active campus gp. during the Vietnam War | 40 |
| Active component in marijuana, for short | 40 |
| Active duty entertainers, in short | 34 |
| Active hallucinogen in funny mushrooms | 38 |
| Active Huey Lewis & the News album? | 39 |
| Active ingredient in marijuana: Abbr. | 37 |
| Active ingredient in nail polish remover | 40 |
| Active Philippine volcano: Abbr. | 32 |
| Active time for a racetrack crew | 32 |
| Activist Blades who co-founded moveon.org | 41 |
| Activist Bonner who married Sakharov | 36 |
| Activist Brockovich played by Julia | 35 |
| Activist campus org. of the '60s | 36 |
| Activist Dana or her husband Christopher | 40 |
| Activist gp. with a clenched fist in its logo | 45 |
| Activist request on bumper stickers | 35 |
| Activist Shelby and politician Michael | 38 |
| Activist/playwright Clare Boothe ___ | 36 |
| Activities at punk rock concerts | 32 |
| Activities that consume many hours | 34 |
| Activities that generate no money | 33 |
| Activity for a band's obsessive fans | 40 |
| Activity for a crooked politician? | 34 |
| Activity for a crossword creator | 32 |
| Activity for a hyperactive barista? | 35 |
| Activity for an entomologist taking inventory? | 46 |
| Activity for diners and list makers | 35 |
| Activity for good-looking people? | 33 |
| Activity for one hoping to expose roots | 39 |
| Activity for some season ticket holders  | 48 |
| Activity for Spartacus in 74 B.C. | 33 |
| Activity for which "it takes two" | 43 |
| Activity in "Ghostbusters" | 36 |
| Activity in a post–W.W. I free city? | 43 |
| Activity in which camels may be executed | 40 |
| Activity in which nothing is going on? | 38 |
| Activity in which one takes a bow | 33 |
| Activity in which people get their kicks | 40 |
| Activity in which spelling counts? | 34 |
| Activity in which stakes may be laid | 36 |
| Activity in which the police may beat down a door | 49 |
| Activity in which you might tug on an earlobe | 45 |
| Activity involving a 20-sided die, maybe: Abbr. | 47 |
| Activity involving a keyhole, perhaps | 37 |
| Activity involving U-boat hopping? | 34 |
| Activity led by a park ranger, perhaps | 38 |
| Activity of boatmen, bondsmen and paratroopers | 46 |
| Activity of chefs and porkbarrel politicians | 44 |
| Activity of conquerors or pacifiers | 35 |
| Activity of most puzzle constructors | 36 |
| Activity of one who's paper-trained? | 40 |
| Activity on a kid's place mat | 33 |
| Activity resulting in a net gain? | 33 |
| Activity that can wreck a hard disk | 35 |
| Activity that can wreck a hard disk? | 36 |
| Activity that destroys a hard disk | 34 |
| Activity that destroys a hard disk? | 35 |
| Activity that improves the well-being of canines | 48 |
| Activity that includes roundhouse kicks | 39 |
| Activity that involves seeing people? | 37 |
| Activity that may include flowers and candy | 43 |
| Activity that may put you over a barrel | 39 |
| Activity that may require a lift | 32 |
| Activity that proceeds hand to hand? | 36 |
| Activity that requires powder on the face? | 42 |
| Activity that's not without interest | 40 |
| Activity with a downward-facing dog | 35 |
| Activity with holding and throwing | 34 |
| Activity-filled summer getaway places | 37 |
| Actor (and crossword fan) Matthew | 33 |
| Actor Adrian on "T.J. Hooker" | 39 |
| Actor Alan of "Hope & Gloria" | 43 |
| Actor Alan of "The Change-Up" | 39 |
| Actor Alan of "The In-Laws" | 37 |
| Actor Alastair of "A Christmas Carol" | 47 |