Crossword Genius

Crampon primarily used by supple mountaineer (7)

Ross

I believe the answer is:

climber

'mountaineer' is the definition.
(thesaurus)

'crampon primarily used by supple' is the wordplay.
'primarily' suggests taking the first letters.
'used by' is a charade indicator (letters next to each other).
'supple' becomes 'limber' ('limber' can be a synonym of 'supple').
The first letter of 'crampon' is 'c'.
'c'+'limber'='CLIMBER'

(Other definitions for climber that I've seen before include "Mountaineer" , "Plant such as ivy" , "Bonnington" , "Edward Whymper, for example" , "in the garden" .)

I've seen this clue in The Times.
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