Drivers protect golf range (3)
I believe the answer is:
aga
'range' is the definition.
(I've seen this in other clues)
'drivers protect golf' is the wordplay.
'drivers' becomes 'aa' (I've seen this in other clues).
'protect' means one lot of letters goes inside another.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'aa' placed around 'g' is 'AGA'.
(Other definitions for aga that I've seen before include "Proprietary name for a domestic stove" , "Oven" , "... Khan is a spiritual Muslim leader" , "Turkish governor" , "Foreign ruler" .)