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.
(I've seen this before)
'in' acts as a 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" .)