Paradise Lost poet (6)
I believe the answer is:
'paradise lost poet' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for milton that I've seen before include "and 24: Town in Bucks" , "English poet (Lycidas)" , "Bucks new town" , "Great poet of 'Paradise Lost'" , "Paradise Lost author" .)