Old shelter has scope (6)
I believe the answer is:
extent
'scope' is the definition.
(I've seen this in another clue)
'old shelter' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'shelter' becomes 'tent' (canvas shelter).
'ex'+'tent'='EXTENT'
'has' is the link.
(Other definitions for extent that I've seen before include "Range or scope of something" , "Scope, area" , "Degree - amount - scope" , "The size or scale of something" , "Measure" .)