Beneficiary taking shelter outside entrance, possibly (7)
I believe the answer is:
legatee
'beneficiary' is the definition.
(I know that legatee is a type of beneficiary)
'shelter outside entrance possibly' is the wordplay.
'shelter' becomes 'lee' (as in lee side, the side sheltered from wind).
'outside' is an insertion indicator.
'entrance possibly' becomes 'gate' (a gate is a type of entrance).
'lee' enclosing 'gate' is 'LEGATEE'.
'taking' is the link.
(Other definitions for legatee that I've seen before include "Gifted person" , "One who gains benefits" , "Person who is left something in a will" , "one remembered" , "Beneficiary of a will" .)