| One coming down from a landing | 30 |
| One coming down the aisle? | 26 |
| One coming from Mars? | 21 |
| One coming in from the bullpen | 30 |
| One coming onstage | 18 |
| One coming out | 14 |
| One coming out of its shell? | 28 |
| One coming out, briefly | 23 |
| One coming over | 15 |
| One coming through in the clutch | 32 |
| One commemorative feast | 23 |
| One committing grave crimes? | 28 |
| One commonly follows "said" | 37 |
| One compatible with a Sagittarius, it's said | 48 |
| One complete circuit | 20 |
| One completely lacking morals | 29 |
| One completes a monument | 24 |
| One concern of a derby bettor | 29 |
| One concern of a grammarian | 27 |
| One concern of a personnel chief | 32 |
| One concern of a proofreader | 28 |
| One concern of a skipper | 24 |
| One concern of a teacher | 24 |
| One concern of an insurer | 25 |
| One concern of ophthalmologists | 31 |
| One concern of the E.P.A. | 25 |
| One concerned about charges | 27 |
| One concerned about wrinkles? | 29 |
| One concerned with bites | 24 |
| One concerned with blocking | 27 |
| One concerned with bouquets | 27 |
| One concerned with checks and balances | 38 |
| One concerned with checks and balances, briefly | 47 |
| One concerned with checks and balances: Abbr. | 45 |
| One concerned with classes | 26 |
| One concerned with clemency | 27 |
| One concerned with co. money | 28 |
| One concerned with composition and angles | 41 |
| One concerned with creature comforts? | 37 |
| One concerned with duds? | 24 |
| One concerned with el niño | 29 |
| One concerned with entrances and exits | 38 |
| One concerned with feet | 23 |
| One concerned with feet and rhythm | 34 |
| One concerned with figures? | 27 |
| One concerned with financial minutiae | 37 |
| One concerned with handicaps | 28 |
| One concerned with how much money you make | 42 |
| One concerned with lines | 24 |
| One concerned with matters of the heart: Abbr. | 46 |
| One concerned with pitches | 26 |
| One concerned with rhythm and feet | 34 |
| One concerned with right and wrong | 34 |
| One concerned with school activities? | 37 |
| One concerned with show horses? | 31 |
| One concerned with the nose | 27 |
| One concerned with the spot market? | 35 |
| One concerned with Times changes | 32 |
| One conclusion of the description | 33 |
| One conditionally freed | 23 |
| One conducting an investigation | 31 |
| One conferring honor upon | 25 |
| One connected with: Suffix | 26 |
| One connected with: Suffx | 25 |
| One conquered by Pizarro | 24 |
| One conquered by the conquistadors | 34 |
| One considering a proposal | 26 |
| One Constantinople ruler | 24 |
| One contacted by an executor | 28 |
| One contemplating retirement, maybe | 35 |
| One contending successfully | 27 |
| One controlling drones | 22 |
| One cooking a return | 20 |
| One corner in Monopoly | 22 |
| One corner of a Monopoly board | 30 |
| One corner on a Monopoly board | 30 |
| One could be a picked-up pickup | 31 |
| One could be on a crib sheet? | 29 |
| One could cost you your queen | 29 |
| One could eventually lead to a patent | 37 |
| One could give you a check | 26 |
| One could go up to 11 in "This Is Spinal Tap" | 55 |
| One could make sin thin | 23 |
| One could put the squeeze on you | 32 |
| One coulomb per sec | 19 |
| One coulomb per second | 22 |
| One coulomb/ second | 19 |
| One counted in an express checkout | 34 |
| One counterpart | 15 |
| One counting calories | 21 |
| One courting | 12 |
| One covering the infield | 24 |
| One created by hydrolysis | 25 |
| One crippled the Northeast in 2003 | 34 |
| One criterion for an R rating | 29 |
| One criterion for sorting | 25 |
| One critically examining | 24 |
| One crossing a line | 19 |
| One crossing Main, maybe | 24 |
| One crossing the plate | 22 |