6  Decline last of meal found in drain (5)

 9  Working with almost unbelievable claw (5)

10 Ruling the waves is disappointing fare (4,5)

11 Intend assistance escorting vessel I'm backing (4,2,4)

12 Film people leave Europe for America (4)

14 Licks dirt on guest's cases (7)

15 Pig comes back in to book a couple (7)

17 Shakespeare's sister rings round for herb (7)

19 Burrowers belonging to woman backing the Republicans (7)

20 Terrible experience finishing with impure ethyl alcohol (4)

22 Collection to compress one pound in total (5,5)

25 Head back to university in central Ohio City with semi-cold food (4,5)

26 From the beginning, information is missing down in Holland (5)

27 County cross to be Roman earlier (5)

28 Lie-a-bed subsequently blocked by father's return (4,5)

 1  Policeman has ultimately corrupt companion to get rid of (5)

 2  Point of 11 car crashes (9)

 3  Bum (and liar) out of 12 (10)

 4  Periods of operation increasing on paper (7)

 5  Lock-keeper corrupt in heart (7)

 6  Nutritive stuff obtained by combining oxygen and chlorine, possibly in reverse (4)

 7  Spinning gold rings sort of light up large fleshy protuberance (5)

 8  People who ask questions about lines adopted by web commenters (9)

13 One arriving to escort obvious whinger (10)

14 Delicious piece of oyster awkward host brought in my direction (9)

16 Some formations of 12 bristle oddly during part of cricket match (9)

18 Visual shows current temperature dropping (7)

19 Boss understood about footwear (3,4)

21 Is breaking records but speaks indistinctly (5)

23 Big old bird crossing left and right tooth (5)

24 Team up to grab live goat (4)