It's played in place people are confined with ball (5)
I believe the answer is:
cello
'it's played' is the definition.
(cello is a kind of musical instrument)
'place people are confined with ball' is the wordplay.
I cannot really see how this works, but
'place' could be 'cell' (I have seen 'Place of confinement ' mean 'cell' so perhaps 'place' could also mean 'cell') and 'cell' is located in the answer.
'ball' could be 'o' (O looks like a ball) and 'o' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for cello that I've seen before include "Bowed musical instrument" , "Viola's bigger brother?" , "Bass stringed instrument" , "10 [INSTRUMENT]" , "String quartet instrument" .)