Honshu peak (4)
I believe the answer is:
fuji
'honshu peak' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for fuji that I've seen before include "Extinct volcano in central Japan" , "Extinct volcano is the highest peak in Japan" , "Sacred Japanese mountain" , "Japan's sacred mountain" , "Japan's highest peak" .)