Crossword Genius

The whole prison sentence, unsurpassed up to now (3-4)

Ross

I believe the answer is:

all-time

'unsurpassed up to now' is the definition.
(as in an all-time record)

'the whole prison sentence' is the wordplay.
'the whole' becomes 'all' (I've seen this before).
'prison sentence' becomes 'time' (as in 'doing time').
'all'+'time'='ALL-TIME'

(Other definitions for all-time that I've seen before include "Unsurpassed to date" , "Best ever" , "Hitherto unsurpassed" , "As yet unsurpassed" , "So far unsurpassed" .)

I've seen this clue in The Times.
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