Certain about turn-around in renegade deputy (9)
I believe the answer is:
surrogate
'deputy' is the definition.
(I know that Surrogate is a type of deputy)
'certain about turn-around in renegade' is the wordplay.
I cannot quite see how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is present in the answer.
'turn' could be 'u' (a 'U-turn' is a kind of turn) and 'u' is located in the answer.
'around' could be 'o' (a round letter) and 'o' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for surrogate that I've seen before include "Deputising substitute" , "Argues about rot with substitute or deputy" , "(A) substitute in office" , "Substitute fulfilling the role of another" , "stand-in" .)