Crossword Genius

Something afoot? (5)

Ross

I believe the answer is:

pedal

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

'afoot?' is the definition.
Although both the answer and definition are adjectives, I cannot understand how one could define the other.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for pedal that I've seen before include "work with press from Oxford?" , "One may be sustaining" , "One of two a cyclist needs" , "Foot-lever" , "sustained note" .)

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