1: No one told sister (3)

3: Skin gash exists (5)

6: Madonna and child in stonework? (7)

7: 'True men' is false (9)

9: To hear's possible in this (7)

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

13: Small piece of fish (3)

1: Vet theatre opening 8-down (3)

2: Pronounced ability to smell negative votes (3)

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

4: Herb talked about the fourth dimension (5)

5: Dispatches last bits following Saturday (5)

7: Spices clubs (5)

8: Character from Greece or the borders of Transylvania (5)

10: Concealed hot part of psyche (3)

11: Clean oneself, but in reverse (3)