Do not prepare or plan for conclave tea - he arranges it (5,2,6)

I believe the answer is:

leave to chance

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'do not prepare or plan' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'conclave tea he arranges it' is the wordplay.
'conclave tea he' anagrams to 'LEAVE TO CHANCE'.
However, I'm not sure how the anagram is indicated.

'for' acts as a link.

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I've seen this clue in The Irish Times.

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