13d Arthur C (6), science- fiction author ofThe City And The stars. (6) 14ac Italian seaport.(5) 1 US5ac Tristan`s lover in Arthurian legend. (6) 16ac Spartan geneal, commander of the fleet that defeated the Athenians in 405 BC. (8) 17ac The west wing workplace of the US President. (4-6) 18ac Max (5), German artist. 1891- 1976. 20ac Respiratory disrder often allergic in nature. (6)