Would you mind repeating the reprieve? (6)
I believe the answer is:
pardon
'the reprieve?' is the definition.
(reprieve is a kind of pardon)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for pardon that I've seen before include "indulgence" , "Forgive, perhaps judicially" , "Forgive or excuse (an offence)" , "Forgive the polite interruption" , "Forgive (an error)" .)