Cryptic crossword - The Scotsman 14/05/14

ACROSS

1 In fact a revolutionary enthusiast (7)

5 Cautious vehicle has refined fuel (7)

9 But ironical about oiling to achieve smoothness (11)

10 Undermine a retrograde step (3)

11 What dragon is doing when it’s very angry (9,4)

14 Ern won new fame (6)

16 Lady leading orchestra with Spanish dance-tune (8)

18 Refinements of friendly matches (8)

19 Nurse Eve getting into the river (6)

21 Noted lurching performing in bare essential only? (13)

24 Conservative William in Welsh valley (3)

25 Protecting lady having redeeming quality (6,5)

26 Plunder newfangled idol especially on the inside (7)

27 In-flight entertainment? (7)

DOWN

1 Double enclosure (4)

2 From Ravenna, Bobby, a rich man (5)

3 Wee perfume! (6,5)

4 Loquacious teetotaller in carriage (6)

5 Fault-finding when very ill (8)

6 I leave wreck and flee (3)

7 One with fanciest sort of charm (9)

8 Seeing what another has to say (3-7)

12 Solemn Australian sexton (5-6)

13 Said to be marked (10)

15 Not a mendacious sort of biblical character (9)

17 No measure of height when ocean is calm (3,5)

20 Way Australasian solider does not finish part of poem (6)

22 Said architect’s grind (5)

23 From yours truly, shout of pain, catty cry (4)

25 Three-eighths of a Brazilian city or three-fifths of a French river (3)