Across unclued lights (one of two words) combine with down ones to suggest the surnames of four famous English painters; the puzzle’s title suggests the name of a fifth. The fifth letters of these names form STARS. Elsewhere, ignore three accents.
 

Across

11    Leading soldier and cardinal are to stick together (6)
13    Uncouth William cycling and looking hot (7, hyphened)
15    Subdued headgear suited no bureaucrat (5)
16    Hard and weird rug one dumped (5)
17    Like a mountain canteen, high but not cold (6)
18    Fantastic seaweed Beehive State imported (5)
20    Storehouses menials almost step inside (6)
21    Antibiotic in favour with Curie (5)
22    Darling on...