A bit of a foot bounder (4)
I believe the answer is:
heel
'bounder' is the definition.
(synonyms)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for heel that I've seen before include "Command to a trained dog" , "Rogue" , "Achilles's weak spot" , "swine" , "Rotten type" .)