Crossword Genius

Knockabout fun as her ploy goes wrong (9)

Ross

I believe the answer is:

horseplay

'knockabout fun' is the definition.
(horseplay is rough play)

'as her ploy goes wrong' is the wordplay.
'goes wrong' indicates an anagram.
'as'+'her'+'ploy'='asherploy'
'asherploy' with letters rearranged gives 'HORSEPLAY'.

(Other definitions for horseplay that I've seen before include "Rough boisterous action" , "Boisterous antics" , "Messing about (as a steed?)" , "clowning around" , "Rough or boisterous activity" .)

I've seen this clue in The Times.
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