1: Mineral springs start to moderate involuntary muscular contraction (5)
2: Old Testament character, New Testament incident (5)
3: Study a French instrument - it's a puzzle (9)
4: Doctrine for some Kiwis makes sense (3)
5: One final, huge Greek goddess (3)
9: Belated top-and-tailing to gladden one's heart (5)
11: Road without a pole (4)
12: 23% of Scandinavians backing leaders (3)