Clockword

The solutions from 1 to 12 are all six-letter words ending with the letter T in the centre. Moving clockwise from 1, the letters in the outer circle spell out the name of a former World no.1 tennis player.

1. Short coat 7. Bring out

2. Requiring fast action 8. Tasmanian port

3. Rigorous 9. Secure by intimidation

4. Goal 10. Naturist

5. Whole 11. Invertebrate

6. Most agreeable 12. Sweet