Shelter for gull (4,2)
I believe the answer is:
take in
I believe this clue is a double definition.
'shelter' is the first definition.
'gull' is the second definition.
('take in' can be a synonym of 'gull')
'for' is the link.
(Other definitions for take in that I've seen before include "Grasp - admit - fool" , "Deceive (someone)" , "contract" , "Enclose; deceive" , "Shelter - hoodwink" .)