Effusive in public after getting English degree (11)

I believe the answer is:

emanational

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'effusive' is the definition.
Both the definition and answer are adjectives.
Perhaps they are linked in a way I don't understand?

I can't explain the rest of the clue.

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(Another definition for emanational that I've seen is " Emerging".)

I've seen this clue in The Times and The Sunday Times.

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