Prohibit instruments of torture in army quarters (8)
I believe the answer is:
barracks
'torture in army quarters' is the definition.
'barracks' can be an answer for 'quarters' (I have seen 'Military quarters' mean 'barracks' so perhaps 'quarters' could also mean 'barracks'). I'm not sure about the 'torture in army' bit.
'prohibit instruments' is the wordplay.
'prohibit' becomes 'bar' (to bar is to ban or prohibit).
'instruments' becomes 'racks' (rack is a kind of instrument).
'bar'+'racks'='BARRACKS'
'of' is the link.
Can you help me to learn more?
(Other definitions for barracks that I've seen before include "Military encampment" , "Buildings to accommodate armies" , "Heckles" , "Cheers ironically" , "Jeers in soldiers' quarters" .)