Painter in the red? (6)
I believe the answer is:
titian
I believe this clue is a double definition.
'painter' is the first definition.
(Titian is an example)
'the red?' is the second definition.
(thesaurus)
'in' is the link.
(Other definitions for titian that I've seen before include "Venetian artist" , "artist from Venice" , "It. painter, famous for redheads" , "Venetian fifteenth-sixteenth century painter" , "Reddish-gold; painter" .)