Crossword Genius

Having had a lot of drinks, started to smoke (3,2)

Ross

I believe the answer is:

lit up

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

'started to smoke' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for lit up that I've seen before include "like a bulb, perhaps?" , "Drunk (as a bulb?)" , "was illuminating" , "Drunk (informal)" , "bulb so transformed room?" .)

I've seen this clue in The Guardian and The Globe and Mail.
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.