Cultivating hanepoot? That will never happen (3,1,4)

I believe the answer is:

not a hope

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'will never happen' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'cultivating hanepoot?' is the wordplay.
'cultivating' is an anagram indicator.
'hanepoot' with letters rearranged gives 'NOT A HOPE'.

'that' is the link.

Can you help me to learn more?

(Other definitions for not a hope that I've seen before include "That'll never happen" , "No chance at all (informal)" , "it'll never happen!" .)

I've seen this clue in The Hindu.

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