Prison staff returning drug to Chalky or Dusty, say (8)
I believe the answer is:
nickname
'chalky or dusty say' is the definition.
I can't judge whether this definition defines the answer.
'prison staff returning drug' is the wordplay.
'prison' becomes 'nick' (slang term for prison).
'staff' becomes 'man' (as in staffing or manning a particular place).
'returning' shows that the letters should be reversed in order.
'drug' becomes 'e' (E is another name for ecstasy).
'man' in reverse letter order is 'nam'.
'nick'+'nam'+'e'='NICKNAME'
'to' is the link.
Can you help me to learn more?
(Other definitions for nickname that I've seen before include "term for someone" , "Jack the Ripper, for example" , "Cognomen" , "Friendly appellation by which person is known" , "Affectionate or invented appellation, not one's own" .)