Crossword Genius

For faultless service on the motorway, he doesn't want to pay! (5)

Ross

I believe the answer is:

miser

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

'for faultless service on the motorway he doesn't want to pay' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'motorway he doesn't want to pay' is the wordplay.
I cannot quite understand how this works, but
'motorway' could be 'mi' (resembles M1, English motorway) and 'mi' is located in the answer.
The remaining letters 'ser' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for miser that I've seen before include "Stingy type" , "One sparing with money" , "Curmudgeon" , "One doesn't like to give" , "Mean-minded type" .)

I've seen this clue in the Evening Standard.
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