Most fashionable chocolates, tiny boxes (6)
I believe the answer is:
latest
'most fashionable' is the definition.
(I've seen this in another clue)
'chocolates tiny boxes' is the wordplay.
'boxes' says the answer is hidden in the clue (to box can mean to contain).
'LATEST' is hidden within 'chocolates tiny'.
(Other definitions for latest that I've seen before include "Most recent report" , "Up-to-the-minute" , "Most recent (news)" , "Current" , "Stop press news?" .)