1a Dodgeball - "(let's get out of) Dodge" + 'ball' (party)
11a Teach - '(cyclis)t' (close) + 'each' (a head)
18a Loris - 'i' (one, in) lor's (brother's; as exclamation)
28a Ecotage - 'E(nglish)' + 'cot(t)age' (no heart)
29a Lip-reader - 'leader' (article, about) 'i (one) PR (way of voting)'