Crossword Genius

Waiter’s blow up Everest helper? (5)

Ross

I believe the answer is:

piton

I'm a little stuck... Click here to teach me more about this clue!

This might be a double definition.

'waiter's' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'blow up everest helper?' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

Can you help me to learn more?

(Other definitions for piton that I've seen before include "Climber's iron peg" , "What mountaineer requires" , "Mountaineering tool" , "Mountaineer's metal spike" , "climber needs this" .)

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.