Prepared to smoke under the influence (3,2)
I believe the answer is:
lit up
'prepared to smoke' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for lit up that I've seen before include "like a bulb, perhaps?" , "Prepared to smoke" , "high" , "Flashing" , "Started smoking - being drugged!" .)