What's offensive in goon's laughter (9)

I believe the answer is:

onslaught

'what's offensive' is the definition.
(thesaurus)

'in goon's laughter' is the wordplay.
'in' says the answer is hidden in the clue.
'ONSLAUGHT' is hidden in the letters of 'goons laughter'.

(Other definitions for onslaught that I've seen before include "Heavy attack" , "offensive action" , "Violent attack" , "Hunt goals (anag) - offensive" , "Barrage" .)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app