Crossword Genius

Comes forward to show what climber must face? (5,2)

Ross

I believe the answer is:

steps up

'comes forward' is the definition.
('step up' can be a synonym of 'come forward')

I can't explain the remainder of the clue.

(Other definitions for steps up that I've seen before include "Approaches" , "Accelerates" .)

I've seen this clue in The Times.
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