7		Term for gentle gradations of tone in oil painting (7)
9		18C Italian fresco painter (7)
10		In brief, London gallery showing contemporary works (3)
11		Major gallery on London's Embankment (4,7)
12		Pictures of posers! (9)
14		Stylish, agile (5)
16		Make an etching (7)
18		Architecturally decorative features on pillars, etc. (7)
20		Greek island (5)
21		Not water-based paint (3,6)
23		Red-brown colour (5,6)
25		See 13 Down
26		A permit – of the artistic kind? (7)
27		Deep pink (7)

1		Sort of halo (4)
2		Highly accomplished artist – and teacher? (6)
3		18th C. English painter of horses (6)
4		One who plans e.g. a product's 'look' (8)
5		Spanish master, painter of Third of May, 1808 (4)
6		Half of a partnership producing artists' colours and other materials (6)
7		Go dotty as a painter! (7)
8		A peripheral sort of sketch? (7)
13/25A		Bloomsbury Group artist/art critic (5,3)
15		Portable collection of an artist's works (5)
17		An etching with a watercolour appearance (8)
18		The potato plant (7)
19		An aerosol container (5,3)
20		Metallic element and deep blue colour (6)
21		Oily yellow-green-brown fruits (6)
22		Warm colour (6)
24		One sort of paper used for oriental painting (4)
25		A typeface set (4)