Better than expected? Certainly not at Sunningdale! (5,3)

I believe the answer is:
above par
'better than expected?' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for above par that I've seen before include "better than expected" , "at a premium" , "bad score on course" , "Brave OAP may be better than average" , "Higher than average - bad in golf" .)
