Drug addict celebrity reveals identity online (8)

I believe the answer is:

username

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

'identity online' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'drug addict celebrity' is the wordplay.
'drug addict' becomes 'user' (someone who uses drugs).
'celebrity' becomes 'name' (as in a 'big name').
'user'+'name'='USERNAME'

'reveals' acts as a link.

Can you help me to learn more?

(Other definitions for username that I've seen before include "Log in identifier" , "One's identifier on a computer" , "Computer log-in requirement" , "Something needed for logging in" , "Online identity" .)

I've seen this clue in The Independent.

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.