1 An ordered array of the components of an emission or wave (8)
5 Painter such as Picasso (6)
8 Humorously sarcastic or mocking (6)
9 Equestrian sport (8)
10 An architectural support or base (8)
11 Russian vehicle pulled by three horses abreast (6)
12 Place reserved for wives and concubines and female relatives in a Muslim household (8)
13 Large heavy rope for nautical use (6)
15 Any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions (6)
18 Inflammation of a nerve accompanied by pain and sometimes loss of function (8)
20 Swelling from excessive accumulation of serous fluid in tissue (6)
21 Devices that force air or steam against an edge or into a cavity and so produce loud shrill sounds (8)
23 Expel evil spirits (8)
24 Wind instrument player (6)
25 Someone who is not a clergyman or a professional person (6)
26 Physicist who formulated the special theory of relativity and the general theory of relativity (1879-1955) (8)

1 Be perfunctory (5)
2 100th anniversary (9)
3 Performance of music or dance especially by soloists (7)
4 Inaccessible place (6,2,7)
5 Long-legged spotted cat of Africa and southwestern Asia having non-retractile claws (7)
6 Style of handwriting with the letters slanting to the right (7)
7 Book of synonyms (9)
12 Any plant of the genus Veronica (9)
14 A man's sleeveless garment worn underneath a coat (9)
16 The branch of biology that studies animals (7)
17 Resembling paradise; causing happiness (7)
19 Imaginary creature (7)
22 A smooth fabric of silk or rayon (5)