| Cause of Cleopatra's undoing | 32 |
| Cause of colonists' concern in 1765 | 39 |
| Cause of delirium in farm animals | 33 |
| Cause of ex-doughboys' desertion of farms | 45 |
| Cause of familial misunderstanding | 34 |
| Cause of gray hair and worry lines, some say | 44 |
| Cause of head-scratching in Florida | 35 |
| Cause of head-scratching, perhaps | 33 |
| Cause of high temperatures in the tropics? | 42 |
| Cause of Irish emigration in the 1840s-'50s | 47 |
| Cause of Jove's laughter: Juliet | 36 |
| Cause of Leah's many pit stops? | 35 |
| Cause of many calls to the police, often | 40 |
| Cause of mental distress, perhaps | 33 |
| Cause of mental or metal fatigue | 32 |
| Cause of much super PAC spending | 32 |
| Cause of negative earnings-per-share | 36 |
| Cause of over 5,000 annual deaths in India | 42 |
| Cause of problems in radio communication | 40 |
| Cause of rage against the machine? | 34 |
| Cause of screaming and fainting, perhaps | 40 |
| Cause of silence in the locker room | 35 |
| Cause of some 2002-2003 travel warnings | 39 |
| Cause of some allergic reactions | 32 |
| Cause of some bad weather anomalies | 35 |
| Cause of some ear trouble, for short | 36 |
| Cause of some gridiron blunders? | 32 |
| Cause of some idiosyncratic rituals: Abbr. | 42 |
| Cause of some minority election victories | 41 |
| Cause of some repetitive behavior, in brief | 43 |
| Cause of some shaking, for short | 32 |
| Cause of some turnover on a farm | 32 |
| Cause of some unwanted expansion | 32 |
| Cause of some weather conditions | 32 |
| Cause of some weaving, for short | 32 |
| Cause of stomach problems, sometimes | 36 |
| Cause of subzero temperatures in the US in 2014 | 47 |
| Cause of the 1773 Boston "party" | 42 |
| Cause of unhealthful weight gain | 32 |
| Cause panic in a theater, perhaps | 33 |
| Cause people to disbelieve, with "on" | 47 |
| Cause persistent worry, with "at" | 43 |
| Cause prejudice among Phoenician citizens? | 42 |
| Cause someone's insomnia, maybe | 35 |
| Cause supported by Maureen Reagan | 33 |
| Cause to cease to exist, in olden times | 39 |
| Cause to rise, as a price on eBay | 33 |
| Cause your sweetheart to fall asleep? | 37 |
| Cause ___ (major public controversy) | 36 |
| Caused a reversal of a situation | 32 |
| Causes a classroom disturbance, perhaps | 39 |
| Causes a small program to crash? | 32 |
| Causes fear mixed with reverence | 32 |
| Causes for alarm in the West German capital? | 44 |
| Causes for stadium cheers, for short | 36 |
| Causes of end zone celebrations, for short | 42 |
| Causes of in-flight "bumps" | 37 |
| Causes of meteorological phenomena? | 35 |
| Causes of slippery road conditions | 34 |
| Causes of some celebrity clashes | 32 |
| Causes of some domestic disturbances | 36 |
| Causes of some traffic slowdowns | 32 |
| Causes to bring out the National Guard | 38 |
| Causes trouble, in old-fashioned talk | 37 |
| Causing a "glass ceiling" | 35 |
| Causing a dashboard light to go on, in a way | 44 |
| Causing audience tears, quite possibly | 38 |
| Causing constriction of the pupil | 33 |
| Causing constriction of the pupils | 34 |
| Causing excessive pupil contraction | 35 |
| Causing only minor irritation, say | 34 |
| Causing the most wolf whistles, perhaps | 39 |
| Caustic "Cheers" character | 36 |
| Caustic "Fight Club" substance | 40 |
| Caustic chemical used in making soap | 36 |
| Caustic compounds produced during prenatal exams? | 49 |
| Caution before making a wild assertion | 38 |
| Caution beforehand, with "off" | 40 |
| Caution to a German shepherd, say | 33 |
| Caution to one who overlooks you? | 33 |
| Cautionary song about condiments? | 33 |
| Cautious people try to stay on it | 33 |
| Cavaliers and Indians, on scoreboards | 37 |
| Cavaradossi's love in a Puccini opera | 41 |
| Cavaradossi's love, in opera | 32 |
| Cave dweller becomes source of light | 36 |
| Cave famously visited by Picasso | 32 |
| Cave in Spain famed for its prehistoric paintings | 49 |
| Cave to police pressure, in a way | 33 |
| Cave ___ ("Beware of dog," to Caesar) | 47 |
| Cave ___ (beware of the dog, in Latin) | 38 |
| Cave-dwelling princess in Donald Duck comics | 44 |
| Caveat after a financial warning | 32 |
| Caveat before a subjective statement, online | 44 |
| Caveat initials on a party invite | 33 |
| Caveat letters next to some links | 33 |
| Caveat on a cheapskate's BBQ invite | 39 |
| Caveat on a party invitation: Abbr. | 35 |
| Caveat ___ (let the buyer beware) | 33 |
| Cavefish's functionless parts | 33 |