Cryptic across
5 Defeated by David, is Zerah dead? (9)
8 ‘God zone’ is marginalized by Americans (4)
9 Native American, a popular author, unfortunately Ike is replaced by a detective as leader (8)
10 He’s cruel if roused! (7)
12 For Joppa, is the future orange? (5)
14 Return of detergent’s acceptable to priest (5)
15 Dionysius’ companion is, in Amsterdam, a risk (7)
17 Plague is agitating ascetic monk (8)
18 Blue-green Lima-backed beverage (4)
19 Biblical themes, usually by Ariosto or another (9)