Go without a garment, creating mockery (8)
I believe the answer is:
travesty
'mockery' is the definition.
(synonyms)
'go without a garment' is the wordplay.
'go' becomes 'try' (both can mean an attempt).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'garment' becomes 'vest' (vest is a type of garment or item of clothing).
'a'+'vest'='avest'
'try' going around 'avest' is 'TRAVESTY'.
'creating' is the link.
(Other definitions for travesty that I've seen before include "Sham" , "Grotesque distortion" , "Grotesque misrepresentation" , "Take off" , "Charade" .)