How one may get remit, perhaps, to regress (3,4,3,5)

'regress' is the definition.
(to put back the clock is to go backwards)

'how one may get remit perhaps' is the wordplay.
I cannot really see how this works, but
'one' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
'perhaps' could be 'back' (I've seen this in other clues) and 'back' is found in the answer.
This explanation may well be incorrect...

'to' acts as a link.