Husband no longer wanting sex in retirement (4)
I believe the answer is:
exit
'retirement' is the definition.
(I've seen this in other clues)
'husband no longer wanting sex' is the wordplay.
I cannot really understand how this works, but
'sex' could be 'it' (common euphemism) and 'it' is found within the answer.
'no longer' could be 'ex' (prefix meaning former or onetime) and 'ex' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for exit that I've seen before include "Relinquish the lead" , "farewell!" , "Escape route?" , "Sudden rush of pleasure" , "Leave the building" .)