Fashionable item of jargon (8)
I believe the answer is:
buzzword
(Other definitions for buzzword that I've seen before include "Bit of jargon that's become fashionable to say" , "Bit of in-group jargon" , "Fashionable bit of jargon (for bees?)" , "Unit of speech in vogue" , "Fashionable slogan" .)