"Dad's 70th Prize Crossword": HTML5 Crossword

Across

1. Base diet ferments this condition (8)
3. Seedy cat? (5)
4. Solver often trailed stick around these hills (4,8)
5. Mansion for Barbie's stiff hubby?! (7,5)
7. No doubt ask all over for a quiet place (5,5)
12. Pole defenders at old stomping ground (5,7)
13. Somewhat degenerative rambler is dear to us (4)
14. Old boy sounds like a bouncing bird! (3,5)
16. Cat often heard before goosey? (4)
17. Setter's preferred seat change is announced in town (7)
18. Haemorrhaged a lake! (4)

Down

2. Lesioning botched by drunk doctor (15)
6. Blue, medium bird tricked and trapped in cage (9)
8. Cut beginning of opera? Italian delight! (7)
9. Local restaurant is a mismanaged fiscal heap (4,6)
10. Can Greek character expand mountain home? (7,4)
11. It's complex to learn a piece from Bach essentials (5)
15. Byron oddly had love for this city (4)