Disturbed at noise in the country (7)
I believe the answer is:
estonia
'the country' is the definition.
(European country)
'disturbed at noise' is the wordplay.
'disturbed' indicates anagramming the letters (the order of letters is disturbed).
'at'+'noise'='atnoise'
'atnoise' anagrammed gives 'ESTONIA'.
'in' is the link.
(Other definitions for estonia that I've seen before include "Baltic republic, capital Tallinn" , "So eat in about here in Northern Europe" , "Northern European country" , "Republic in the Baltic region, once part of USSR" , "Country on the Baltic Sea" .)