Partners to capture freewheeling rogue operator (7)
I believe the answer is:
surgeon
'operator' is the definition.
(someone who operates)
'partners to capture freewheeling rogue' is the wordplay.
'partners' becomes 'sn' (South and North are partners in the game bridge).
'to capture' means one lot of letters goes inside another.
'freewheeling' indicates anagramming the letters (I've seen this in other clues).
'rogue' is an anagram of 'urgeo'.
'sn' placed around 'urgeo' is 'SURGEON'.
(Other definitions for surgeon that I've seen before include "Ship's doctor" , "Doctor in the navy" , "Naval doctor" , "Theatre worker" , "Doctor in operating theatre - RN doctor" .)