Primates may see sins regularly in new roles (7)
I believe the answer is:
lorises
'primates' is the definition.
(I've seen this before)
'sins regularly in new roles' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'in' indicates putting letters inside.
'new' is an anagram indicator.
The alternate letters of 'sins' are 'is'.
'roles' with letters rearranged gives 'lores'.
'is' going inside 'lores' is 'LORISES'.
'may see' is the link.
(Other definitions for lorises that I've seen before include "Mammals" , "Primates" .)