Crossword Genius

Putting more on the page: bulking out the story (7)

Ross

I believe the answer is:

padding

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'story' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Another definition for padding that I've seen is " Soft stuffing".)

I've seen this clue in the Evening Standard.
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