Husband getting with it is a success (3)
I believe the answer is:
hit
'success' is the definition.
(a hit is a commercial success)
'husband getting with it' is the wordplay.
'husband' becomes 'h' (abbreviation).
'getting with' means one lot of letters go next to another.
'h'+'it'='HIT'
'is a' is the link.
(Other definitions for hit that I've seen before include "Sock" , "Thump" , "Murder" , "skier, perhaps" , "Popular song; strike" .)