It eases their distress when evil seer is destroyed (8)

I believe the answer is:

relieves

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'it eases their distress' is the definition.
The definition suggests a singular noun but the answer is not.

'evil seer is destroyed' is the wordplay.
'is destroyed' indicates anagramming the letters.
'evil'+'seer'='evilseer'
'evilseer' anagrammed gives 'RELIEVES'.

'when' acts as a link.

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(Another definition for relieves that I've seen is " Alleviates".)

I've seen this clue in The Irish Times.

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