1: Hangs tough, concealing apprehension (5)
2: Oak's first seen on the first of May with its leaves out (5)
3: Irrational number turning his coat into nut (9)
4: Therefore, finish off this bit of work (3)
5: Bend in the middle and wind back (3)
9: Eskimo intuitions are half-developed (5)
10: Making out but not frosting (5)
11: One may be transported by this kiss, it's said (3)
12: Odds of niece being born (3)