Additionally, they have tasteful contents (6)

I believe the answer is:

cruets

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'contents' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for cruets that I've seen before include "Truces about condiment containers" , "Table containers for salt and pepper" , "Salt and pepper are kept in them" .)

I've seen this clue in the Evening Standard.

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