Cryptic crossword - The Scotsman 22/07/14

ACROSS

1 Primitive group I found highly regulated in section of city (5,8)

10 Painting by former schoolteacher? (3,6)

11 Sharp implements used in dressmaking (5)

12 Gets thinner when ran back to ranks (7)

13 Using bacteria etc in production of both ice and soup (7)

14 Animal to resort to Emergency Room, having acid stomach (6)

16 Almost stop big cat from getting horse (7)

18 Psychic spins the plate (8)

20 Mess up frothy foams (6)

23 Swear to get engineer in as agent of reprisal (7)

24 Airline staff shunned close hairstyle (7)

26 Much turnover can be had from game of chance (5)

27 Is senior politician an American chap? (9)

28 Propose to do some ironing (5,4,4)

DOWN

2 Cup reported to be won by horseman? (5)

3 Site of massacre of French is all the rage (1,2,4)

4 Hate to be tested unfairly (6)

5 Best ruse worked out for certain winnings on wagers (4,4)

6 Communist vote placed by bird (7)

7 Pride came before a fall: grab the moment! (5,4)

8 Threw out one total being set in stone (3,10)

9 Like objects that don’t fall over in the present situation (2,6,5)

15 I hear two girls have got together to create synthetic fabric (9)

17 Embarks on jumps before half of town (6,2)

19 Animals take an age in America to become Homers, for example (7)

21 Noblewoman who is unrivalled when First Lady enters (7)

22 Abrasion suffered in fight over last place (6)

25 Dotcom birth covering two functions in one (5)