I suggest that we put up American monument (5)

I believe the answer is:

stela

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'monument' is the definition.
(I know that stela is a type of monument)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for stela that I've seen before include "Standing stone" , "Stone tablet" , "Upright stone slab" , "Ancient column" , "People having digs" .)

I've seen this clue in The Guardian.

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