Cryptic crossword

ACROSS

1. Followed around vessel consisting of many interconnecting parts (11)

9. Top man behind bar is talking abruptly (7)

10. Less than perfect mark scored in course, confused minor (7)

11. South Korean city being infiltrated by people on the eastern side (5)

12. Finds fault with pickled ham pieces (9)

13. Staff staggered around a driving course (4)

14. Judges accepting points with cordiality (10)

17. Cosy shelter’s bad omen upset tenant (3-3,4)

20. Scrub a metal sleeve used in drilling (4)

23. Club pie is prepared for market (9)

25. Topic in patchwork showing edging of small loops (5)

26. Enlightened editors accommodating condition set by one (7)

27. Rival located outside Otago almost finished film clip (7)

28. Troop leader trapped in fallen tent shifted material (11)

DOWN

1. A port rebuilt in centre should be shared (9)

2. Fellow embracing one heartless lady above all? (6)

3. One punching wayward golfer should be warmer (3,4)

4. Helicopter a policeman manoeuvred around hospital (7)

5. Time served by man in Asia and part of Australia (8)

6. Buck, for example, heard a little deer (5)

7. One who mistreats a bold employer (6)

8. Guys like breaking golf gear (6)

15. Sister, wearing diamonds, rolled over and ate, say (9)

16. Roman building the Italian featured in simple article (8)

17. Fish-eating bird overseas observed by target (6)

18. Disorganised editor not initially tested for suitability (5,2)

19. Nude elf changed as required (7)

21. Professional killers turned them in (6)

22. Leafy vegetable special runs out (6)

24. Short bridge that is close to cliff (5)