Tennis playing area (5)
I believe the answer is:
court
'tennis playing area' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for court that I've seen before include "invite > defendant to appear here" , "Assembly to conduct 12 across" , "Legal or royal assembly" , "Woo - where tennis is played" , "Sports area; woo" .)