Cryptic crossword

ACROSS

7 Distinguished old king had a new daughter (5)

8 Established order of etiquette in ceremony (9)

10 Proceed to flow from spring (6)

11 Did small firm render up, having gained exclusive control? (8)

12 Showed a film, under cover like 1 down (8)

13 Challenged rival to duel, initially (4)

15 They are prepared to take a chance to be like 4 down (7)

17 At the end, spaced out, so turned tail (7)

20 Gives the French time to have open society (4)

22 Shoot after prisoner who may devise a plot to escape (7)

25 Staff had to perform on line with one new instrument (8)

26 Searches for a catch, in the main (6)

27 Having hid, cheers up like 1 down (9)

28 Get a rise out of the top table at leisure (5)

DOWN

1 Top class pottered about, when under guard (9)

2 Return stake, having made some profit (8)

3 Have to transfer Grant, if opposed to surrender (7)

4 If one member passes through, it makes headway (8)

5 Lay down that everyone, for example, had to start eating (6)

6 Broadcast from the past rewired for sound (5)

9 Have the last word in the Old or new Testament (4)

14 Insensitive at the centre of the French society (9)

16 Ill at ease when having to work with fewer breaks (8)

18 Turned up, having affected to bear fruit (8)

19 CNN sure turned out to be an object of loathing (7)

21 Brook may finish up running into a river (6)

23 Catches some of the cabinet slacking, like 26 across (4)

24 Did a leading charity long to find a hidden store of treasure? (5)