Dance technique never succeeded with fellow in plant (11)

I believe the answer is:

dicotyledon

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'plant' is the definition.
(dicotyledon is a kind of plant)

'dance technique never succeeded with fellow' is the wordplay.
I cannot really see how this works, but
'fellow' could be 'don' (both can mean an academic) and 'don' is found within the answer.
This explanation may well be incorrect...

'in' acts as a link.

Can you help me to learn more?

I've seen this clue in The Times.

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