Crossword Genius

Units formerly on government service (4)

Ross

I believe the answer is:

ohms

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

'units' is the definition.
(ohm is a kind of unit)

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

Can you help me to learn more?

(Other definitions for ohms that I've seen before include "Units of electrical resistance" , "Measure of resistance" , "Letters with official status in correspondence" , "working for the monarchy?" , "Electricity" .)

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.