Not barefoot (4)
I believe the answer is:
'not barefoot' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for shod that I've seen before include "Not with bare feet" , "Fitted with footwear" , "Wearing footgear" , "Like a horse that's been to a farrier" , "with hooves protected?" .)