One calling out from back of court? (8)
I believe the answer is:
linesman
'one calling out from back of court?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'one calling out from back' is the wordplay.
'one calling' becomes 'line' (I've seen this in another clue).
'out from' becomes 'nams' (I can't explain this - if you can you should give a lot more credence to this answer).
'back' says the letters should be written in reverse.
'nams' back-to-front is 'sman'.
'line'+'sman'='LINESMAN'
Can you help me to learn more?
(Other definitions for linesman that I've seen before include "sports official" , "Court official" , "Football official" , "Touch judge" , "Male official with a flag" .)