Crossword Genius

Is rude in an article on public transport (6)

Ross

I believe the answer is:

abuses

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'is rude' is the definition.
I can't tell whether this defines the answer.

'an article on public transport' is the wordplay.
'an article' becomes 'a' (the indefinite article in English).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'public transport' becomes 'buses' (I've seen this before).
'a'+'buses'='ABUSES'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for abuses that I've seen before include "Treats cruelly" , "Maltreats people or things" , "Employs or deals with incorrectly" , "Reviles and insults" , "Reviles or takes undue advantage." .)

I've seen this clue in the Evening Standard.
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