US agent supplied with information? (3)

I believe the answer is:

fed

I'm a little stuck... Click here to teach me more about this clue!

'us agent' is the definition.
(short for a federal agent)

I cannot understand how the remainder of the clue works.

(Other definitions for fed that I've seen before include "Provided courses" , "Provided food for" , "Given food to eat" , "Nourished" , "American cop" .)

I've seen this clue in The Irish Times.

Want a hint initially instead of a full solution? Install my app