Airline no longer flying over a country (6)
I believe the answer is:
panama
'country' is the definition.
(Panama is an example)
'airline no longer flying over a' is the wordplay.
'airline no longer' becomes 'PanAm' (Pan American World Airways, former airline).
'flying over' says to put letters next to each other (in a down clue, some letters go above others).
'panam'+'a'='PANAMA'
(Other definitions for panama that I've seen before include "Canal state; hat" , "Headgear for a canal" , "American canal or kind of hat" , "Great American canal or tropical hat" , "Central American country" .)