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Has nothing to complain of, really (9)

Ross

I believe the answer is:

malingers

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'has' is the definition.
The definition and answer can be both to do with social activities as well as being verbs in their -s form.
Perhaps they are linked in a way I don't understand?

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

Can you help me to learn more?

(Another definition for malingers that I've seen is " avoids duty".)

I've seen this clue in the Evening Standard.
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