Answer: one

AnswerCrossword Clue
ONEUnited
ONEArea-code preceder
ONEHalf and half
ONEHydrogen's number
ONELike no other
ONELow number
ONESeries opener
ONESmall bill
ONEThe loneliest number
ONEThree Dog Night hit
ONEUndivided
ONE1300 hours
ONEWashington's note
ONEWord on a penny
ONE"... Bad Apple" (Osmonds hit)
ONEFirst number
ONEImpossible craps roll
ONESingle
ONEIt's better than nothing
ONE... World Trade Center
oneperson or thing
ONELiftoff preceder?
ONE"A Chorus Line" number
ONE"My .. and Only"
ONE"..-Trick Pony" (Paul Simon film)
ONE"... for the money"
ONE10% of a sawbuck
ONE1969 Three Dog Night hit
ONEChange-machine input
ONEHole in ....
ONEItalian noble family
ONE20% of a fin
ONEMike-tester's first word, often
ONESingular
ONEUpright figure?
ONEWashington's whereabouts
ONEWhere Washington is
ONEWord on a dollar
ONE"All for ... ..."
ONE"All for ..., ..."