Ends as Jack Choi produces some sporting footwear (3)
I believe the answer is:
ski
'some sporting footwear' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'ends as jack choi' is the wordplay.
'ends' indicates one should take the final letters.
The last letters of 'as jack choi' are 'SKI'.
'produces' is the link.
Can you help me to learn more?
(Other definitions for ski that I've seen before include "Winter sport equipment" , "Walk on snow" , "Go downhill rapidly" , "Narrow runner for snow and water" , "Move over snow on runners" .)