Lawmaker who might be an allegorist (10)
I believe the answer is:
legislator
'lawmaker' is the definition.
(I know that lawmaker can be written as legislator)
'might be an allegorist' is the wordplay.
'might be' indicates anagramming the letters (I've seen this in other clues).
'allegorist' with letters rearranged gives 'LEGISLATOR'.
'who' is the link.
(Other definitions for legislator that I've seen before include "Lawmaker" , "One in Westminster perhaps" , "Parliamentarian" , "lawman" , "Lawgiver" .)