All answers are things which fly; birds, insects, air transport, and creatures of myth, fiction and legend
This one is really doing my head in
10 S! [9]
These are also not helping the head either
25 Blow your horn! [7] 26 Coloured decorations? [7] 29 First of the 36th? [8] 30 Comes from a woolly bear! [6,5] 32 Harvey's receptacle? [10] 33 Caper? [4]