Last one
12A Is the definition 'listened in'
If not-what ???
One picking up most of bacteria eating last bit of brie (8,2)
I have -i-t-e-i with nn to be added.
Clue gratefully accepted
Billy, Excellent!! I looked to Listerine, the mouth wash thinking the name derived from a bacteria but found it's named after Joseph Lister. I should have probed deeper.
Thank you very much
Only got to this today and all but finished. Can you confirm if the unadulterated version of 14d is a large musical instrument associated with concertos. I don't get the Pizza Hut wordplay, except in a sort of pidgin Italian way, so wonder if I'm way off mark.