In which balls are hit in nets perhaps (6)
I believe the answer is:
tennis
'in which balls are hit' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'in nets perhaps' is the wordplay.
'perhaps' indicates anagramming the letters.
'in'+'nets'='innets'
'innets' anagrammed gives 'TENNIS'.
Can you help me to learn more?
(Other definitions for tennis that I've seen before include "Pete Sampras's sport" , "Sent in, strangely, for sport" , "Game played on court" , "McEnroe's game" , "Roger Federer's game - anyone for it?" .)