Europeans declared money orders (7)

I believe the answer is:

cheques

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

'money orders' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for cheques that I've seen before include "Money orders" , "Bank orders" , "Sort of ready" .)

I've seen this clue in The Guardian.

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