Plotters use it (5,5)

I believe the answer is:

graph paper

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This might be a double definition.

'plotters use' is the first definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

'it' is the second definition.
The definition suggests a singular noun which matches the answer.

Can you help me to learn more?

(Another definition for graph paper that I've seen is " On which to plot chart".)

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

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