Crossword Genius

It helps climber no end on way up (5)

Ross

I believe the answer is:

piton

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'it helps climber' is the definition.
The definition suggests a singular noun which matches the answer.

'no end on way up' is the wordplay.
'end' becomes 'tip' (tip is a kind of end).
'on way up' says the letters should be written in reverse.
'no'+'tip'='notip'
'notip' back-to-front is 'PITON'.

Can you help me to learn more?

(Other definitions for piton that I've seen before include "What mountaineer requires" , "Mountaineer's metal spike" , "Climber's tool" , "In top (anag.)" , "Spiked climbing aid" .)

I've seen this clue in The Daily Mail.
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