I am using men's pissoir in the style of Monet (13)

I believe the answer is:

impressionism

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Other definitions for impressionism that I've seen before include "Art school" , "art movement" .)

I've seen this clue in the Sydney Morning Herald.

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