Another first-rate effort from the ever-popular Picaroon.
Not overly difficult, but that's not to say there aren't quite a few very tricky parses to unpack, and I still haven't fully understood the wordplay for 10d but, thankfully, the crossing letters and definition meant there could only be one answer.
If you do get struck, there is at least one hidden and at least one long anagram, both in the acrosses.
Picaroon certainly covered a lot of subjects and people with this one, from opera, literature, religion and geography to name but a few.
COD - I think I'll pick 1a.
On a side note, I'll be interested to hear from Geeker if 9a is really how "American's get into beer".
Thanks to Picaroon for a great way to kick of a cold December weekend:-)
Please feel free to leave a comment or ask for a hint if you get stuck.
New members are particularly welcome.
Stay safe:-)