It's bound to go on foot (6)
I believe the answer is:
sandal
'foot' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'it's bound to go on' is the wordplay.
'it's' becomes 'sal' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'bound' indicates putting letters inside.
'to go on' becomes 'and' (I've seen this in another clue).
'sal' enclosing 'and' is 'SANDAL'.
Can you help me to learn more?
(Other definitions for sandal that I've seen before include "Light open shoe" , "Light strapped shoe" , "Light footwear" , "Light open-toed shoe" , "Casual footwear" .)