Quick clues

ACROSS 1 That may be disjoined (9) 6 Sacred and prohibited (5) 9 Large palm seed (7) 13 Fertile desert spot (5) 14 Artist’s workshop (7) 15 Something inhibiting action (9) 16 Treatment of light and shade in drawing (11) 17 The money required for a particular purpose (11) 18 Formal headgear (3,3) 19 Gigantic figure (8) 21 Sharp localised pain (6) 25 Short joke (3-5) 26 Sense of optimism affecting voting, buying, etc (4-4,6) 28 Large bowl (5) 29 Explanation or system of anything (6) 30 Town in county Durham (10) 33 Calling at each house in turn (4-2-4) 35 Denoting older people (6) 36 Spore-producing organisms (5) 38 Philosophical doctrine (14) 40 Act without restraint (2,2,4) 42 Nuclear (6) 43 Christian symbol (8) 44 Adjust to a situation (6) 47 Deceitful (11) 50 Stimulant of desire (11) 52 Something produced from a source (9) 53 Three-pronged spear (7) 54 Topic, subject (5) 55 Line touching a curve (7) 56 Before the usual time (5) 57 Realistic and tough-minded (4-5)

DOWN

1 One able to endure hardship; philosopher (5) 2 Artist in a particular style (4-13) 3 Restaurant booking (11) 4 Stew in a closed pan (6) 5 Will enactor (8) 6 Branch of mathematics (12) 7 Sir Harrison —, composer (10) 8 Earthy pigment (5) 9 Overcrowded (9) 10 Statement of qualifications (11) 11 Eg, Beethoven’s choral symphony (5) 12 Consisting of three parts; voice (6) 18 Medieval lyric poet (10) 20 Occurring at irregular intervals (8) 22 Set to work seriously (3,4,2,8) 23 Inflamed with passion (6) 24 Brightness, vividness (10) 27 Person possessed by an evil spirit (8) 31 Extreme fear (6) 32 Insight into and understanding of things (12) 34 Group of three in power (11) 36 Affected by extreme cold (11) 37 Harsh questioner (10) 39 Record keeper (9) 41 Using the latest scientific knowledge and methods (4-4) 45 Commercial (6) 46 Hat; eg, rower (6) 48 Edible crustacean (5) 49 Unit of weight; cat (5) 51 Statement of belief (5)