State aid distributed by health officers in the van (5)

I believe the answer is:

idaho

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

'state' is the definition.
(US state)

I don't understand how the rest of the clue works.

(Other definitions for idaho that I've seen before include "State of northwest US" , "Another state" , "NW state of USA" , "Pertaining to the Bard" , "US state, capital Boise" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.