Cryptic crossword No 1,451

Across

1. Restricted fencing at open (6)
2.  Edward consumed a wild bear as an afternoon treat (8)
3. Drover's two children taken in by hermits' leader (8)
4. Ballad on Queen's hens (6)
5. Negative about former Manx race nearby (4,2)
6. Flower in cap used at Passover (7)
7. STD caught on knees? (4)
8. Fry, adding basil evenly, for Titania? (5)
9. Penniless pensioners loudly interrrupted louts  (4)
10. Pick-your-own by old city in America? Sod off! (2,5)
11. Alternate, as in "urinates backwards" (6)
12. Rush round Ulster for pastry (6)
13. Mark Henry, river judge,  takes in four acres for Indian king (8)
14. They're left with grim, stern man  (8)
15. Post no longer in reserve? (6)

Down

1. Tart cook flourishing (8)
2. Seaweed doesn't amaze Pip (4)
3. Work, Natrix?  Thanks - back to the usual time.  (1,5)
4.  Disorder after memo turned up - sweet! (8)
5. Reg turns in early with a hot drink (4,4)
6. A yen after turkey platter (4)
7. Maybe Jasper ruffled coat getting in roller (6)
8. Top in poetry stakes, Yeats starts getting drunk (5)
9. Musical society making fleeces? (5)
10. Cheese or fruit? Special study starting examination (5)
11. Dutch port going Red (8)
12. Bake panic?  Add salt. (8)
13. Stubbs maybe married, but not amazed (6)
14. Four possibly gather together, fishily. (6)
15. Barristers' groups essentially criminally defensible (4)
16. See 4
17. Row from Windsor, if tired (4)