Curry favour with supporter, welcoming wife (4)
I believe the answer is:
fawn
'curry favour' is the definition.
(I've seen this before)
'supporter welcoming wife' is the wordplay.
'supporter' becomes 'fan' (fan is a kind of supporter).
'welcoming' means one lot of letters goes inside another (in sense of 'inviting in').
'wife' becomes 'w'.
'fan' enclosing 'w' is 'FAWN'.
'with' acts as a link.
(Other definitions for fawn that I've seen before include "Curry favour" , "crawl" , "Be obsequious, grovel" , "shade" , "Be obsequious towards young deer?" .)