His fancies rarely last (7)

I believe the answer is:

faddist

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'his fancies rarely last' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

This is all the clue.

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(Other definitions for faddist that I've seen before include "someone very keen on hobby?" , "follower of fashion" , "He's pernickety!" .)

I've seen this clue in The Globe and Mail.

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