1: Mineral springs start to moderate involuntary muscular contraction (5)

3: Backblock not all there (3)

5: Nightwear and jersey top added in afterthought (3)

7: Gripped by instrument, a longish claw (5)

8: Study a French instrument - it's a puzzle (9)

9: The cow may do this in the local veterinary yard (5)

10: Chatter about some pay-back (3)

12: Taverns quoted cool clique (3)

13: Rambling tales are out of date (5)

1: How to eat the heart of marsupial (3)

2: 'True men' is false (9)

3: Bird seen in springtime? Nonsense! (7)

4: Cloth was dug up! (5)

6: Records that could be hits (7)

8: Certain plants contributing to hectic activity (5)

11: He wrote a bit of poetry! (3)