Love taking mouthful in sacred fountain (8)

I believe the answer is:

aganippe

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'fountain' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for aganippe that I've seen before include "poetic inspiration" , "inspiration for poetry" , "fountain" .)

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

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