Something afoot? (5)
I believe the answer is:
pedal
'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" .)