Virginian regularly picking up formal clothes for a saint (8)
I believe the answer is:
ignatius
'a saint' is the definition.
(thesaurus)
'virginian regularly picking up formal clothes' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'picking up' shows that the letters should be reversed in order.
'formal clothes' becomes 'suit'.
The alternating letters of 'virginian' are 'igna'.
'suit' back-to-front is 'tius'.
'igna'+'tius'='IGNATIUS'
'for' is the link.
(Other definitions for ignatius that I've seen before include "A suiting (anag) - saint" , "Saint -- of Loyola" , "martyr" , "Man" , "Early saint" .)