Sullen state, being nursed so badly (8)

I believe the answer is:

dourness

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'sullen state' is the definition.
The definition suggests a singular noun which matches the answer.

'nursed so badly' is the wordplay.
'badly' is an anagram indicator.
'nursed'+'so'='nursedso'
'nursedso' with letters rearranged gives 'DOURNESS'.

'being' acts as a link.

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I've seen this clue in The Guardian.

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