Decorator houses deer for Reykjavik resident (9)
I believe the answer is:
icelander
'reykjavik resident' is the definition.
(Reykjavik is the capital of Iceland)
'decorator houses deer' is the wordplay.
'decorator' becomes 'icer' (some decorating a cake with icing).
'houses' indicates putting letters inside.
'deer' becomes 'eland' (eland is a type of antelope).
'icer' placed around 'eland' is 'ICELANDER'.
'for' acts as a link.
(Other definitions for icelander that I've seen before include "Nationality of citizen of Reykjavik" , "northerner" , "Nordic person" , "North Atlantic dweller" , "Eg a person from Reykjavik" .)