Stand for bone-shaped biscuit, perhaps (5)
I believe the answer is:
treat
'stand' is the definition.
(both can mean to provide with food)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for treat that I've seen before include "Care for medically" , "could be a feast" , "pay for another" , "Cure" , "Medicate" .)