Man-mountain? (3)
I believe the answer is:
ben
I believe this is a double definition.
'man' is the first definition.
'mountain?' is the second definition.
(ben is a kind of mountain)
(Other definitions for ben that I've seen before include "Mountain peak (Scot.)" , "A Gaelic mountain like Bulben" , "Tropical tree" , "The boy from the Scottish mountains" , "Scottish mountain peak" .)