Cryptic crossword No 3,884

Across

1. Savvy plot foiled - mother-of-pearl retained (8)
2. The very core of the NHS; and without burden! (8)
3. Messily compile a controversial view (7)
4. A reward for each ruler (4)
5. Daring act; firstly undertook really exciting studies at school, landing cushy position (8,2)
6. Kept in secret government files; initial understanding from over-loaded onerous gits? Yes, information is final! (7,4)
7. I hear that June, July and August are more hale & hearty (10)
8. Note to self is musical (4)
9. Plane traversing Bel Air and Bushmills (6)
10. Chirpy sport (7)
11. Cultivate 1000 borage? Put a ban on it! (7)
12. Ink drawing - it’s rubbish n’all! (6)
13. Looked for in today’s office? Not at work for a while (4,3)

Down

1. He sails recklessly to find girls down under (7)
2. Legless loud speaker left utility vehicle with energy (7)
3. Find a comfy seat. Play dominant and subdominant! (4)
4. Rip-off wool (6)
5. Very short cinema visits given library storage methods (10)
6. Corrupt politicians scramble around wildly (7)
7. Grog monarch drinks nothing, goes nuts!! (6)
8. Emu’s rear muddled in steamy drink, filthy business (4)
9. One pierced the skin, so nurse stepped in. No-one saw it? (7)
10. Appear crackers and greet men crazily! (11)
11. Broken record (I broke it!) for continuous talking (8)
12. Just the worst; no saint, I established (8)
13. To feebly orchestrate subtly provides atmosphere (10)