Absolutely prevent good men wearing women’s clothing (4,2,6)
I believe the answer is:
bang to rights
'women's clothing' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'absolutely prevent good men wearing' is the wordplay.
'absolutely' becomes 'bang' (eg 'bang up to date' means 'absolutely up to date').
'prevent good' becomes 'tights' (I am not sure about this - if you are sure you should believe this answer much more).
'men' becomes 'OR' (military abbreviation for other ranks).
'wearing' indicates putting letters inside.
'tights' placed around 'or' is 'torights'.
'bang'+'torights'='BANG TO RIGHTS'
Can you help me to learn more?
(Other definitions for bang to rights that I've seen before include "with incriminating evidence" , "Caught red-handed; with positive proof of guilt" , "Caught red-handed (informal)" , "Report from Left's" , "caught in the act!" .)