Wife and I rowed terribly? My wife's now gone (7)
I believe the answer is:
widower
'my wife's now gone' is the definition.
(a man whose wife has died)
'wife and i rowed terribly?' is the wordplay.
'wife' becomes 'w'.
'and' says to put letters next to each other.
'terribly?' indicates anagramming the letters (I've seen 'terribly' mean this).
'rowed' is an anagram of 'dower'.
'w'+'i'+'dower'='WIDOWER'
(Other definitions for widower that I've seen before include "His wife is deceased" , "Bereaved man" , "One who has lost wife" , "Man left" , "Man whose wife has died" .)