Possibly resort a duty list (6)
I believe the answer is:
roster
'a duty list' is the definition.
(I've seen this before)
'possibly resort' is the wordplay.
'possibly' is an anagram indicator.
'resort' with letters rearranged gives 'ROSTER'.
(Other definitions for roster that I've seen before include "Duty plan" , "Resort (anag)" , "List of people's turn of duties" , "List of duties and those who are to perform them" , "Work list" .)