Crossword Genius

Dry stone work's not so fashionable (6)

Ross

I believe the answer is:

trendy

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'fashionable' is the definition.
(similar in meaning)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for trendy that I've seen before include "Informally in the latest fashion" , "following fashion" , "Modish" , "all the rage" , "Hot" .)

I've seen this clue in the Sydney Morning Herald.
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