Crossword Genius

Completed fitting -- not before time! (7)

Ross

I believe the answer is:

overdue

'not before time' is the definition.
(after time)

'completed fitting' is the wordplay.
'completed' becomes 'over' ('over' can be a synonym of 'completed').
'fitting' becomes 'due'.
'over'+'due'='OVERDUE'

(Other definitions for overdue that I've seen before include "Late like unpaid bill" , "Late for payment" , "Late arriving" , "Not consumed" , "(Of library books) late" .)

I've seen this clue in The Telegraph.
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