Dark red colour (6)
(Other definitions for claret that I've seen before include "Wine from the Bordeaux region" , "Shade of red" , "Dry red wine of Bordeaux" , "Type of red wine" , "Red Bourdeaux wine" .)
(Other definitions for maroon that I've seen before include "Dark crimson" , "Purplish colour" , "Slaves' descendant" , "Strand, isolate" , "Abandon (eg, on island)" .)