Red slogan I must follow, and join in (7)
I believe the answer is:
chianti
'red' is the definition.
(I know this)
I don't understand how the rest of the clue works.
(Other definitions for chianti that I've seen before include "Popular dry red wine of Tuscany" , "European wine" , "Chain it to popular Italian wine" , "I can hit (anag) - alcoholic drink" , "Italian offering" .)