Not quite a score (8)
I believe the answer is:
nineteen
'not quite a score' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nineteen that I've seen before include "not quite the full score" , "after the round, the number for the next round?" , "Highest teenage age" , "Almost score" , "Upper age limit for 2 Down" .)