1 Capital of Croatia (6)
5 Geoffrey ---, designer of the Kennedy memorial at Runnymede (8)
9 A showy gesture; grow well (8)
10 The --- Papers, 1888 story by Henry James (6)
11 Iranian prime minister 1951-3 (8)
12 A star-shaped object (6)
13 City in NW Texas (8)
15 He traded his birthright to his brother Jacob for a mess of pottage (4)
17 Nocturnal birds of prey with hawk-like beak and claws (4)
19 Car named after a young girl whose father bought many cars built by the Daimler company (8)
20 Danish explorer who gave his name to the strait separating Asia and North America (6)
21 Chief support of the ageing Sir Henry in Scott's novel Woodstock (5,3)
22 Type of rhododendron (6)
23 City in Northern India, site of massacre in 1919 (8)
24 Classical Japanese drama form developed between the 14th and 16th centuries (alt. spell.) (3,5)
25 Poet, author of Absalom and Achitophel (6)

2 --- Day, the second of November (3,5)
3 French philosopher, author of The Social Contract (8)
4 Matchmaking TV show presented by Cilla Black (5,4)
5 President of the US from 1824 (4,6,5)
6 African kingdom, capital Maseru (7)
7 Verse form devised by Bentley (8)
8 1994 US Open winner (5,3)
14 The ---, 1979 US film which was the story of Dillinger's mistress (4,2,3)
15 Hitler's mistress (3,5)
16 --- smokie, smoked haddock (8)
17 Shropshire town named after the Saint who died there in 642 (8)
18 Wladziu Valentino ---, US pianist (8)
19 Nigel ---, English racing driver and world champion in 1992 (7)