Change cut of Caerphilly, say, to have rind removed (7)
I believe the answer is:
nickels
'to have rind removed' is the definition.
I can't tell whether this defines the answer.
'change cut of caerphilly' is the wordplay.
'change' becomes 'nick' (nicking is a kind of changing).
'cut of caerphilly' becomes 'els' (I can't explain this - if you can you should believe this answer much more).
'nick'+'els'='NICKELS'
'say' acts as a link.
Can you help me to learn more?
(Other definitions for nickels that I've seen before include "American coins" , "Change in US" , "Five-cent coins" .)