Crossword Genius

A plain fellow treated like a doormat (7,2)

Ross

I believe the answer is:

stepped on

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'treated like a doormat' is the definition.
I can't tell whether this definition defines the answer.

'a plain fellow' is the wordplay.
'a plain' becomes 'steppe' (steppe is a kind of plain).
'fellow' becomes 'don' (both can mean an academic).
'steppe'+'don'='STEPPED ON'

Can you help me to learn more?

(Another definition for stepped on that I've seen is " abused".)

I've seen this clue in The Globe and Mail.
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