Cryptic crossword No 2,336

Across

1. Simon orders Mark to break down misdirection (5,3,7)
2. Having come into two lots of nothing, Lear's daughter leaves (7)
3. Stumble across article written by Foucault about history (7)
4. Silly fool messed around with virus (9)
5. Time to cuddle wife and kids (5)
6. Gap locations finally stocking large leisure suits (7)
7. Susie Dent gutted about reviews (7)
8. 'Magic Mark!' — Simon, with one left, welcomes tip from Goodliffe (5)
9. Fantastic amount of work withdrawing and suppressing nasty quotes (9)
10. Gags and gasps (7)
11. School pupils regularly upset about English course requiring effort? (7)
12. Oxford attraction for literary types that's fully booked? (9,6)

Down

1. Upset fool sometimes swallows port (4)
2. Josh Widdicombe's closing after Brand and Kay  (4)
3. A kiss rejected by hot old flame? Figures!  (8)
4. All told where the witch wanted to get her claws (2,4)
5. Spurs needing one million pounds (8)
6. Spinning Rhythm & Blues on ones and twos (6)
7. One's skewered by satirist penning "Oxford University versus student" (8)
8. They are revealing origin of Glastonbury's stone circles  (1-7)
9. Bucolic river — one in Russia  (5)
10. Idiot set up weapon as way of controlling entry (8)
11. Oxford scholars coming out of their shells at breakfast? (8)
12. Mark (really fine fellow) gives up? (5,3)
13. Unionist about to take brief control of peer's channel (8)
14. Pique as anagram indicated by 'supply' (5)
15. A zoologist at first splits flower with sloth (6)
16. Delicacy required in secrets you've brought up (6)
17. These characters in a file act to define what they are (4)
18. Conference perhaps needing two people in Auditorium (4)