This discussion thread is really helpful so thanks to all. Alas this one I found too difficult.
I'd just to share a frustration on 11. I'd solved this as 'Baron'.
Bar=avoided
on=getting drunk
with Ulster as the redundant word.
If you look up Baron in TCD it is defined as Head (of organisation)
No wonder I was stuck.
Could anyone give me nudge on 10 across?
Thanks