SOLUTION 679:

ACROSS 1 Japonica, 7 Sauna, 8 Ho Chi Minh, 9 Boa, 10 Desk, 11 Botany,

13 Scoria, 14 Oswald, 17 Creole, 18 Isis, 20 Par, 22 Oestrogen, 23 Rumen, 24 Daiquiri.

DOWN 1 Jihad, 2 Picasso, 3 Neil, 4 Clip-on, 5 Rugby, 6 Galahad, 7 Shiatsu,

12 Aileron, 13 Sceptre, 15 Assegai, 16 Alaska, 17 Cramp, 19 Sinai, 21 Iraq.