Prospect that’s disturbed CERN? Yes (7)
I believe the answer is:
scenery
'prospect' is the definition.
(thesaurus)
'disturbed cern? yes' is the wordplay.
'disturbed' indicates anagramming the letters.
'cern'+'yes'='cernyes'
'cernyes' is an anagram of 'SCENERY'.
'that's' is the link.
(Other definitions for scenery that I've seen before include "Stage setting" , "Landscape, view" , "Pleasant vista or play backdrop" , "Landscape features" , "Theatre stage feature" .)