Could it hurt your foot? (4)
I believe the answer is:
sock
'foot?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
I also know that 'foot' relates to this answer.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sock that I've seen before include "This partly protects member" , "Foot covering" , "Foot garment" , "component of Christmas present" , "Wallop" .)