Not like this? Well I never (5,4)

I believe the answer is:

fancy that

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'well i never' is the definition.
(both are expressions of disbelief)

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

Can you help me to learn more?

(Other definitions for fancy that that I've seen before include "Imagine!" , "exclamation of surprise" , "goodness" , "Well I'm blowed!" , "Gosh" .)

I've seen this clue in The Daily Express.

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