Instructions to turn back the clock? (5)
I believe the answer is:
remit
'instructions to turn' is the definition.
I can't tell whether this definition defines the answer.
'back the clock?' is the wordplay.
'back' shows that the letters should be reversed in order.
'the clock?' becomes 'timer' (something which times).
'timer' written backwards gives 'REMIT'.
Can you help me to learn more?
(Other definitions for remit that I've seen before include "Send payment for timer" , "Send (money) in payment; pardon" , "Brief - transfer" , "Assigned task or area" , "Defer" .)