Crossword Genius

On your bike — get moving! (5)

Ross

I believe the answer is:

pedal

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

'on' is the definition.
Although both the answer and definition are adjectives, I cannot see how one could define the other.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for pedal that I've seen before include "Foot control" , "part of organ" , "Ride a bicycle" , "Plead for bike pusher" , "Lever operated by foot" .)

I've seen this clue in The Guardian.
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