Prairie, steppe (5)
I believe the answer is:
plain
This clue is a double definition.
'prairie' is the first definition.
(I've seen this in another clue)
'steppe' is the second definition.
(I've seen this in another clue)
(Other definitions for plain that I've seen before include "ugly" , "Unvarnished" , "lament" , "Not decorated" , "Unprepossessing" .)