Husband leaving comfortable position in French city (4)
I believe the answer is:
nice
'french city' is the definition.
(Nice is a French city)
'husband leaving comfortable position' is the wordplay.
'husband' becomes 'h' (abbreviation).
'leaving' is a deletion indicator.
'comfortable position' becomes 'niche' (I've seen this before).
'niche' with 'h' removed is 'NICE'.
'in' is the link.
(Other definitions for nice that I've seen before include "French resort; agreeable" , "Enjoyable" , "Pleasant - French resort" , "Portuguese river, a centre for port" , "Charming" .)