Number during criminal trial seen making unusual use of court (4,6)
I believe the answer is:
real tennis
'unusual use of court' is the definition.
I can't judge whether this definition defines the answer.
'number during criminal trial seen' is the wordplay.
'number' becomes 'n' (n can represent any number).
'during' is an insertion indicator.
'criminal' is an anagram indicator.
'trial'+'seen'='trialseen'
'trialseen' anagrammed gives 'realtenis'.
'n' placed within 'realtenis' is 'REAL TENNIS'.
'making' acts as a link.
Can you help me to learn more?
(Other definitions for real tennis that I've seen before include "Old sport" , "Early form of Wimbledon's game" , "ancient game" , "In which court member served" , "Game played in court" .)