Desert at America, has a burger (perhaps) counter (7)
I believe the answer is:
atacama
'desert' is the definition.
(Atacama Desert is an example)
'at america has a burger perhaps counter' is the wordplay.
'america' becomes 'a' (common abbreviation - e.g. in organisation names).
'has' means one lot of letters go next to another.
'burger perhaps' becomes 'mac'.
'counter' shows that the letters should be reversed in order.
'a'+'mac'='amac'
'amac' in reverse letter order is 'cama'.
'at'+'a'+'cama'='ATACAMA'
(Other definitions for atacama that I've seen before include "Chilean desert" , "South American desert" , "lot of empty space" .)