Golf course halves (5)
I believe the answer is:
nines
'golf course halves' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nines that I've seen before include "Numbers to which one may be dressed up?" , "Dressed to these and you're well-turned-out" , "In emergency, press three of these" , "Very smart if dressed to these" , "squares" .)