CLOCK WORD
The solutions from 1 to 12 are all six-letter words ending with the letter M in the centre. Moving clockwise from 1, the letters in the outer circle will spell out the name of a late American actress.
1. Artistic movement
2. Assert
3. Exchange
4. Kidnapper’s payment
5. Silvery element
6. Preserve 7. Area of SW London 8. Debilitated 9. Writhe 10. Type of carriage 11. Admiration 12. Musical beat