Crossword Genius

Revolutionary goes beyond mark (4)

Ross

I believe the answer is:

spot

'mark' is the definition.
(spotting is a kind of marking)

'revolutionary goes beyond' is the wordplay.
'revolutionary' shows that the letters should be reversed in order.
'goes beyond' becomes 'tops' ('top' can be a synonym of 'go beyond').
'tops' back-to-front is 'SPOT'.

(Other definitions for spot that I've seen before include "jam > stain" , "Discern - mark" , "See; round mark" , "Catch sight of - pimple" , "Espy; mark" .)

I've seen this clue in The Times.
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