Supply a bit of bread at a price (4)
I believe the answer is:
feed
'supply' is the definition.
(feeding is a kind of supplying)
'a bit of bread at a price' is the wordplay.
'a bit of bread' becomes 'd' (I can't justify this - if you can you should give a lot more credence to this answer).
'at' means one lot of letters go next to another (I've seen this in other clues).
'a price' becomes 'fee' (I've seen this before).
'd' put after 'fee' is 'FEED'.
Can you help me to learn more?
(Other definitions for feed that I've seen before include "Given payment" , "Paid" , "Provide food" , "meal?" , "Give (or take) nourishment" .)