100.

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Across
  1. 4. City's hotel in short somewhere for a chap to go
  2. 5. Original letters from First Girl I Loved, now involved in brief affair (5)
  3. 6. When in continent doctor's right to love delicious food
  4. 8. Its clock speed is measured in Ghz
  5. 10. There's prohibition with love today! (4)
  6. 12. Any of two or more physical forms in which an element can exist
  7. 14. Ecstatic about bit of money that's settled matter
  8. 15. Apt subject for today that's hidden in this puzzle's four longest answers
  9. 16. It's time for a chap to become more forcible (8)
  10. 18. For a chap wandering about, it's near (8)
  11. 19. Yes indeed, to be sure (usually first word in its sentence)
  12. 20. Urge chap to become a journalist (8)
  13. 22. Tropical bird that's settled by brass player?
  14. 24. MAN Part for a fellow to play in the field of cricket (5,3)
Down
  1. 1. Train a chap to be a driver (8)
  2. 2. "Love Today" and "Grace Kelly" singer (4)
  3. 3. A church benefice - now that is an easy vocation (8)
  4. 7. Actress/singer Helen with the CD "Crossword" (the title track starts "I found my true love today doi
  5. 9. TIDE Teen paid badly - it's time for a small rise
  6. 10. It's a bad thing for a chap to be a person of power (7)
  7. 11. FULLNESS OF TIME Eventually, it's sentence without remission (3,8,2,4)
  8. 13. Found pain in love, right away
  9. 17. Try more physical exercise shortly to show how hot it is
  10. 21. Something to think about - it's time for a date! (8)
  11. 23. AGENT Urge a chap to become a PR man