Crossword Genius

In favour of compromise (3)

Ross

I believe the answer is:

pro

'in favour' is the definition.
(I've seen this before)

'of compromise' is the wordplay.
'of' indicates a hidden word.
'PRO' can be found hidden inside 'compromise'.

(Other definitions for pro that I've seen before include "Expert (abbr)" , "Golfer" , "In favour of; advantage" , "Favouring the professional" , "In brief, he's no amateur" .)

I've seen this clue in The Mirror.
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