Crossword Genius

Climber's spike (5)

Ross

I believe the answer is:

piton

'climber's spike' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for piton that I've seen before include "Climber's spike" , "Metal spike used in rock climbing" , "Peg driven into rock in mountain climbing" , "Climber's iron peg" , "What mountaineer requires" .)

I've seen this clue in The Sun, The Times, The Wall Street Journal, the Penny Press and the Newsday.
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