Crossword Genius

Evening wear, about to be carried separately by relatives' subordinates (8)

Ross

I believe the answer is:

adjuncts

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'subordinates' is the definition.
The definition and answer can be both people as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Another definition for adjuncts that I've seen is " Things added or attached but subordinate".)

I've seen this clue in The Independent.
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