Good time for fruit (4)

I believe the answer is:

gage

'for fruit' is the definition.
(a greengage or gage is a type of fruit)

'good time' is the wordplay.
'good' becomes 'g' (abbreviation).
'time' becomes 'age' (an age is a period of time).
'g'+'age'='GAGE'

(Other definitions for gage that I've seen before include "Pledge" , "Glove thrown down by knight as challenge" .)

I've seen this clue in The Times.

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