One wandering right across (5)

I believe the answer is:

rover

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

'one wandering' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'right across' is the wordplay.
'right' becomes 'r' (common abbreviation).
'across' becomes 'over' (synonyms).
'r'+'over'='ROVER'

Can you help me to learn more?

(Other definitions for rover that I've seen before include "Person given to wandering" , "Vehicle driven remotely over extraterrestrial terrain" , "Old scout" , "A vagrant" , "one in Bristol, one in Doncaster, perhaps" .)

I've seen this clue in the Evening Standard.

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.