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On screen newspaper article becomes hit (8)

Ross

I believe the answer is:

walloped

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

'on screen newspaper article' is the wordplay.
'on screen' becomes 'wall' (I can't explain this - if you can you should give a lot more credence to this answer).
'newspaper article' becomes 'op-ed'.
'wall'+'oped'='WALLOPED'

Can you help me to learn more?

(Other definitions for walloped that I've seen before include "affected by strikes?" , "Hit hard" .)

I've seen this clue in The Independent.
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