Food that may be bolted (3)
I believe the answer is:
nut
'food' is the definition.
(type of food)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for nut that I've seen before include "piece of coal" , "Hard fruit; obsessive" , "eccentric type" , "something turned when making fast > food" , "buff" .)