Put a slipper on, ultimately part of a foot fetish (6)
I believe the answer is:
amulet
'fetish' is the definition.
(fetish can mean an object with spiritual powers)
'put a slipper on' is the wordplay.
'put' means one lot of letters goes inside another.
'a slipper' becomes 'mule' (mule is a kind of slipper).
'on' becomes 'at' (I've seen this in other clues).
'mule' put within 'at' is 'AMULET'.
'ultimately part of a foot' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for amulet that I've seen before include "Protective ornament" , "Thing worn as charm against evil" , "Jewel to protect from witchcraft" , "Charm worn against bad luck" , "Charm protecting against evil" .)