Mount in South Dakota (8)
I believe the answer is:
rushmore
'mount in south dakota' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rushmore that I've seen before include "Carved South Dakota Mount" , "US mount with carved presidents' heads" , "Rock figureheads here" , "Mountain with carvings of US presidents" , "Mount . . . . . . . . in USA has carved heads of presidents" .)