Vehicle's range? (6)
I believe the answer is:
sierra
This clue is a double definition.
'vehicle's' is the first definition.
(I've seen this before)
'range?' is the second definition.
(sierra is a kind of range)
(Other definitions for sierra that I've seen before include "mountain area" , "Range of mountains with jagged peaks" , "Vehicle" , "that Romeo is not after" , "International codeword" .)