Ale not drunk in shelter (4-2)
I believe the answer is:
lean-to
'shelter' is the definition.
(I know that lean-to is a type of shelter)
'ale not drunk' is the wordplay.
'drunk' is an anagram indicator.
'ale'+'not'='alenot'
'alenot' anagrammed gives 'LEAN-TO'.
'in' acts as a 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" .)