1: Escalating naked conflict (3)

3: A garden ornament makes men go mad (5)

6: Oxygen is pretty amusing. (3)

7: Proficient in arithmetic, starting with short division (5)

8: Ten orphans pointlessly wander around the Acropolis. (9)

10: Children nicely holding back secret (5)

12: Cleaning aid possessed by Fragonard (3)

14: Notes spent in Germany (5)

15: Encourage horse led with direction. (3)

1: Clown with a tail. (3)

2: Part of stair is erect (5)

3: Grown-up kids' tender hearts god broke? (9)

4: Nothing we have to pay (3)

5: Englishman opening a can to dine at home (3,2)

8: Glint of silica in neat crystal (5)

9: Tender translator of runes (5)

11: And not in town, ordinarily (3)

13: Feel sick from crack? (3)