A wife endures - he's off with a farewell! (3,11)
I believe the answer is:
auf wiedersehen
'a farewell' is the definition.
(auf wiedersehen is a kind of farewell)
'a wife endures he's off' is the wordplay.
'off' is an anagram indicator.
'wife'+'endures'+'he'='wifeendureshe'
'wifeendureshe' is an anagram of 'ufwiedersehen'.
'a'+'ufwiedersehen'='AUF WIEDERSEHEN'
'with' is the link.
(Other definitions for auf wiedersehen that I've seen before include "see you" , "so long in parts of Europe" , "Wanting to say farewell" .)