HI Ginge & Sudokulover - thanks for the help.
Went to Loire for Witsun - trying to catch up on this one - think I'm in the same boat as Orson.
Still no idea on theme - down to last 10!:
* Soak takes in low-down old prof from St. Andrews (6)
* Picked up what's needed to ring Venus? (5)
* Mr. Malik's set back One Direction or is he only joking? (4)
* Tee off at Open venue giving edge to Monty (4)
* Upright academician's off his trolley, by the sound of it (6)
* Short-legged sheep next to a speckled hen (6)
* Mature for one to exchange $100 for Australian traveller (6)
* Fired head of Tesco after supermarket is seen to be out of date (4)
* Legless lecturer's in bed, not all there (6)
* Tiny digression like this could swing by-election