One in French hotel longing for divorce? (7)
I believe the answer is:
unhitch
'divorce?' is the definition.
(I've seen this before)
'one in french hotel longing' is the wordplay.
'one in french' becomes 'un' ('one' in French).
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'longing' becomes 'itch' (itch can mean a desire or longing).
'un'+'h'+'itch'='UNHITCH'
'for' acts as a link.
(Other definitions for unhitch that I've seen before include "Part" , "Release" , "Unhook, unfasten" , "Separate" , "Remove from a harness" .)