Charlesburg - the " 's" in the clue means of the philosopher rather than just his name. Drinking after hours used to involve making sure no one else could get into the bar...
No need to log off Meursault. I always agonise about when a hint turns into a spoiler - it's a fine dividing line sometimes. I think we get it right most of the time and I'm always grateful for the nudges I receive on here!
Thank you both. Got so hung up on the philosopher being Hobbes and trying to parse hobbian (which was bad enough!) that I couldn't see the wood for the bees, as it were. (Sorry, couldn't resist)
Ethik - 27a is scab - front of Store see (C) A Black and definition is rat. 37a is sulfur - American spelling of the colour. A sufu is a Fijian sarong with f for fellow inside and followed by a bit (first letter of) Reluctance. Hope this helps!