Art gallery, say, without works ultimately (4)

I believe the answer is:

tate

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'art gallery' is the definition.
(Tate Modern, Tate Britain etc)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for tate that I've seen before include "Name of two London galleries" , "One of four art galleries in England" , "Art Gallery donor" , "Art gallery founded by sugar magnate" , "Lord Sugar" .)

I've seen this clue in The Independent.

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