Eat out and so on with husband (4)
I believe the answer is:
etch
'eat out' is the definition.
(thesaurus)
'and so on with husband' is the wordplay.
'and so on' becomes 'etc' ('etc.' can be a synonym of 'and so on').
'with' says to put letters next to each other.
'husband' becomes 'h'.
'etc'+'h'='ETCH'
(Other definitions for etch that I've seen before include "Engrave (metal, glass etc.)" , "Engrave metal plate using acid" , "Cut deeply (with acid?)" , "Inscribe" , "Score with acid" .)