Council leader from Rotherham, a Yorkshireman (5)
I believe the answer is:
mayor
'council leader' is the definition.
'from rotherham a yorkshireman' is the wordplay.
'from' indicates the answer is hidden within the clue.
'MAYOR' is hidden within 'rotherham a yorkshireman'.
(Other definitions for mayor that I've seen before include "Town's chief citizen." , "Johnson, say" , "Town official" , "Head of a city council" , "City manager" .)