1: A garden ornament makes men go mad (5)
2: Doctrine for some Kiwis makes sense (3)
3: They say the headmaster should be guided by this (9)
4: Oak's first seen on the first of May with its leaves out (5)
5: Encourage horse led with direction. (3)
9: Tarka beheads scoundrel (5)
10: Authority, for example (sic) (3-2)
11: He wrote a bit of poetry! (3)
12: Capture perfect score in review (3)