Wilts. Depression creates a state of dejection (3-12)

I believe the answer is:

low-spiritedness

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'a state of dejection' is the definition.
'low-spiritedness' can be an answer for 'dejection' (synonyms). I'm unsure of the 'a state of' bit.

'wilts depression creates' is the wordplay.
'creates' indicates an anagram.
'wilts'+'depression'='wiltsdepression'
'wiltsdepression' is an anagram of 'LOW-SPIRITEDNESS'.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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