Cryptic crossword

Across

8 Foodstuff whose ingredients are cake and chip (8)

9 Hum that is auld Edinburgh (6)

10 Coin that's flourishing or fashionable? Not nowadays (6)

11 French writer transformed the lands (8)

12 Leaps away, taken aback to encounter insect (4)

13 Commissionaire told to bring wine (4,6)

15 Progress made with superior method (7)

17 Tidying disorder with ceremony (7)

20 Just the stuff to make goats' cheese with! (10)

22 Wind dropped us in fast car (4)

24 Boy weighing less than pig (8)

26 Pancakes made with original titbits in quantities of water (6)

27 Silences shots (6)

28 Berryade turned into solid food (8)

Down

1 Name for the first-time mother (6)

2 Drop case about game tally (8)

3 Undecided whether to go by plane (2,2,3,3)

4 Change places about first unmanned spacecraft (7)

5 Birder never discovered eagle (4)

6 Correspondent withdraws with endless blushes (6)

7 Something very fine produced if reacting to complaint (8)

14 Medicine that, when in the pink, a swallow may make worse (10)

16 Putting a first lady in union makes for a level playing field 8)

18 It's of no consequence to gun down a conservative (8)

19 Books sign on lines (7)

21 Get log to operate on/off switch (6)

23 Go back and forth between present and past view (6)

25 It's a job to make a request with nothing left out (4)