Blonde with a Yankee, not rough (7)
I believe the answer is:
fairway
'not rough' is the definition.
(golf)
'blonde with a yankee' is the wordplay.
'blonde' becomes 'fair' (similar in meaning).
'with' becomes 'w' (abbreviation).
'yankee' becomes 'Y' (phonetic alphabet: alpha, bravo, charlie etc.).
'fair'+'w'+'a'+'y'='FAIRWAY'
(Other definitions for fairway that I've seen before include "Golf course area between tee and green" , "Part of golf course between tee and green" .)