Five lost from barge in Oxford? (4)
I believe the answer is:
shoe
'oxford?' is the definition.
(oxford is a kind of shoe)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for shoe that I've seen before include "Trainer maybe" , "Foot-covering" , "Last product" , "Rim of metal nailed to a horse's hoof" , "Foot cover" .)