Crossword Genius

Vulgar relations have finished going on stage (3-4)

Ross

I believe the answer is:

leg-over

'vulgar relations' is the definition.
(vulgar term for sex or 'relations')

'finished going on stage' is the wordplay.
'finished' becomes 'over' ('over' can be similar in meaning to 'finished').
'going on' says to put letters next to each other.
'stage' becomes 'leg' ('leg' can be a synonym of 'stage').
'over' put after 'leg' is 'LEG-OVER'.

'have' acts as a link.

I've seen this clue in The Guardian.
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