Vogue includes returning spring fashion (3,5)
I believe the answer is:
rag trade
'fashion' is the definition.
(I've seen this before)
'vogue includes returning spring' is the wordplay.
'vogue' becomes 'rage' (rage is a kind of vogue).
'includes' is an insertion indicator.
'returning spring' becomes 'trad' (I can't justify this - if you can you should believe this answer much more).
'rage' enclosing 'trad' is 'RAG TRADE'.
Can you help me to learn more?
(Other definitions for rag trade that I've seen before include "National winner" , "newsagent's business?" , "Clothing business (colloq.)" , "Clothing business (informal)" , "The couture business" .)