Mountain man? (3)
I believe the answer is:
ben
I believe this is a double definition.
'mountain' is the first definition.
(as in Ben Nevis)
'man?' is the second definition.
(Other definitions for ben that I've seen before include "Mountain peak (Scot.)" , "Tropical tree" , "A Big London clock tower" , "Boy for a Scottish mountain" , "inner room in Oban, say" .)