My husband wears decorative trinkets (5,4)

I believe the answer is:

fancy that

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

I cannot understand how the rest of the clue works.

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

I've seen this clue in The Times.

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