Male blunder — it limits chaps — such fun! (9)
I believe the answer is:
merriment
'fun' is the definition.
(I know that fun can be written as merriment)
'male blunder it limits chaps' is the wordplay.
'male' becomes 'm' (common abbreviation).
'blunder' becomes 'err' (to err is to make a mistake or blunder).
'limits' indicates putting letters inside (limit can mean to contain or block off).
'chaps' becomes 'men' (chap means a man).
'it' enclosing 'men' is 'iment'.
'm'+'err'+'iment'='MERRIMENT'
'such' is the link.
(Other definitions for merriment that I've seen before include "Joy" , "Gaiety, laughter, fun" , "Jollity" , "laughing maybe" , "Hilarity" .)