Crossword Genius

He’s a regular guy (3)

Ross

I believe the answer is:

reg

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

'he's' is the definition.

I can't explain the rest of the clue.

Can you help me to learn more?

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app