Fruit the warder wouldn't allow the prisoner to have? (9)
I believe the answer is:
raspberry
'wouldn't allow the prisoner to have?' is the definition.
I can't judge whether this definition defines the answer.
'fruit the warder' is the wordplay.
'fruit' becomes 'rasp' (I've seen this before).
'the warder' becomes 'berry' (I can't explain this - if you can you should believe this answer much more).
'rasp'+'berry'='RASPBERRY'
Can you help me to learn more?
(Other definitions for raspberry that I've seen before include "rude riposte?" , "that's produced by cane" , "Fruit; rude sound" , "sign of disapproval" , "Bars Perry from having the fruit" .)