Routine criticism husband's accepted (6)
I believe the answer is:
shtick
'routine' is the definition.
(I've seen this before)
'criticism husband's accepted' is the wordplay.
'criticism' becomes 'stick' (giving someone stick is criticising them).
'husband' becomes 'h' (abbreviation).
'accepted' means one lot of letters goes inside another.
'stick' enclosing 'h' is 'SHTICK'.
(Other definitions for shtick that I've seen before include "comedy routine" , "Performer's routine" , "funny routine" , "comic's routine" , "Comedian's routine - kitsch (anag)" .)