FBI agent given meal (3)
I believe the answer is:
fed
This clue is a triple definition!
'fbi' is the first definition.
(thesaurus)
'agent' is the second definition.
(fed is a kind of agent)
'given meal' is the third definition.
(Other definitions for fed that I've seen before include "Provided courses" , "supplied with power?" , "Given sustenance" , "Given food to eat" , "Provided food for" .)