I'm out of ammunition, blasting peak (8)

I believe the answer is:

mountain

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'peak' is the definition.
(I know that peak can be written as mountain)

I don't understand the rest of the clue.

(Other definitions for mountain that I've seen before include "Cold - - (film)" , "Projecting land-mass" , "Two-wheeler designed for rough terrain" , "high position" , "Eminence" .)

I've seen this clue in The Sun.

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