A court overrun by kind of tennis performers (seven are found here) (6,4)
I believe the answer is:
double acts
'performers seven are found here' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'a court overrun by kind of tennis' is the wordplay.
'court' becomes 'ct' (abbreviation used in road names).
'overrun by' indicates putting letters inside (I've seen this in other clues).
'kind of tennis' becomes 'doubles'.
'a'+'ct'='act'
'act' going within 'doubles' is 'DOUBLE ACTS'.
Can you help me to learn more?
(Another definition for double acts that I've seen is " Entertaining couples".)