Fixed radar on small European country (7)
I believe the answer is:
andorra
'small european country' is the definition.
(I've seen this before)
'fixed radar on' is the wordplay.
'fixed' indicates anagramming the letters.
'radar'+'on'='radaron'
'radaron' with letters rearranged gives 'ANDORRA'.
(Other definitions for andorra that I've seen before include "Land up, perhaps" , "Territory" , "part of Europe" , "Small state between France and Spain" , "Catalan state" .)