Ale not drunk in shelter (4-2)
I believe the answer is:
lean-to
'shelter' is the definition.
(lean-to is a kind of shelter)
'ale not drunk' is the subsidiary indication.
'drunk' indicates an anagram.
'ale'+'not'='alenot'
'alenot' is an anagram of 'leanto'.
'in' is the link.
(Other definitions for lean-to that I've seen before include "Outbuilding propped against another wall" , "Add-on building" , "Building built against another" , "Shed, outbuilding" , "greenhouse, perhaps" .)