Collection for Catherine (4)
I believe the answer is:
tate
I believe this clue is a double definition.
'collection' is the first definition.
(as in the Tate art galleries)
'catherine' is the second definition.
(actress Catherine Tate)
'for' acts as a link.
(Other definitions for tate that I've seen before include "art patron" , "Art gallery endowed by a sugar merchant" , "Well-known London art gallery" , "One of four art galleries in England" , "Sugar merchant and art gallery philanthropist, founder, d. 1899" .)