Religious time when a tree's destroyed (6)

I believe the answer is:

easter

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'religious time' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'a tree's destroyed' is the wordplay.
'destroyed' is an anagram indicator.
'a'+'trees'='atrees'
'atrees' anagrammed gives 'EASTER'.

'when' acts as a link.

Can you help me to learn more?

(Other definitions for easter that I've seen before include "Egg-rolling time" , "Christian celebration of the Resurrection" , "Snug retreat" , "Teaser (anag.)" , "8 9 [PACIFIC ISLAND]" .)

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

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