Do start tennis match? (5)
I believe the answer is:
serve
'do' is the definition.
(serving is a kind of doing)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for serve that I've seen before include "deal" , "Milton 'They also . . . . . who only stand and wait'" , "Hand out, food or drink say" , "Answer the purpose" , "Put the ball in play on court" .)