Measure mountain range (5)
I believe the answer is:
chain
I believe this is a double definition.
'measure' is the first definition.
(unit equal to 22 yards)
'mountain range' is the second definition.
(I know that mountain range can be written as chain)
(Other definitions for chain that I've seen before include "a number of hotels" , "Coupling" , "Series of connected things" , "Series of links; sixty six feet" , "Part of cycle" .)