Himalayan peak (7)
I believe the answer is:
everest
'himalayan peak' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for everest that I've seen before include "Tallest mountain ..." , "Mountain named after a British surveyor general of India" , "Mountain on the Nepal-Tibet border" , "High peak" , "Tee revs up the mountain" .)