Answer: nailbiter

AnswerCrossword Clue
NAILBITER

Anxious one, perhaps

NAILBITER

Close game

NAILBITER

Close contest

NAILBITER
Tension-filled sports contest
NAILBITER
Very close game, e.g.
NAILBITERTense situation
NAILBITERSudden-death game, say
NAILBITERBlowout's opposite