Supporter of sports? (3)
I believe the answer is:
tee
This clue might be a double definition.
'supporter' is the first definition.
(I've seen this in other clues)
'of sports?' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for tee that I've seen before include "Stand" , "Golf peg" , "Golfing support" , "Golfer's support" , "Golfer's peg" .)