1: Loathes key English exams (7)

5: One may be transported by this kiss, it's said (3)

7: Making a comeback in White Horse Inn, a musical heroine (5)

8: Very clever fish ain't at sea (9)

9: A supporter starting to mock President Garfield's middle name (5)

10: Now Elton heard California's big one (3)

12: Piano finale not determined (7)

1: Small piece of fish (3)

2: Dressing of malt and beans to make horse tender (9)

3: Some slippers and also shoes (7)

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

6: Putting your foot in it may incite Royal intervention (7)

8: Introduction to book by mere poet (5)

11: Fix the oil platform ... (3)