One pounded with the feet? (4)
I believe the answer is:
beat
'one' is the definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?
'pounded with the feet?' is the wordplay.
'pounded' becomes 'bat' (I can't justify this - if you can you should give a lot more credence to this answer).
'with' indicates putting letters inside.
'feet?' indicates one should take the final letters (I've seen 'foot' mean this (in a down clue, the bottom letter)).
The final letter of 'the' is 'e'.
'bat' placed around 'e' is 'BEAT'.
Can you help me to learn more?
(Other definitions for beat that I've seen before include "Worst - best" , "Musical rhythm" , "club" , "Come out better than in a competition" , "Conquer" .)