Officer that's potty about men (9)
I believe the answer is:
commodore
'officer' is the definition.
(commodore is a kind of officer)
'potty about men' is the wordplay.
'potty' becomes 'commode' ('commode' can be a synonym of 'potty'**).
'about' means one lot of letters goes inside another.
'men' becomes 'or' (I've seen this in other clues).
'commode' placed around 'or' is 'COMMODORE'.
'that's' is the link.
(Other definitions for commodore that I've seen before include "Naval rank junior to rear-admiral" , "officer, surely?" , "President of a yacht club" , "senior officer" , "Naval officer" .)