Golf gear in white ewer (3)
I believe the answer is:
tee
'golf gear' is the definition.
'in white ewer' is the wordplay.
'in' indicates a hidden word.
'TEE' is hidden within 'white ewer'.
(Other definitions for tee that I've seen before include "support of leisure activity" , "Mark" , "Starting place on the golf course" , "Peg for golfer" , "Where one drives from" .)