Hi all, I enjoyed this one, and didn't find it too challenging, apart from the rather odd 'primarily' answer, which, along with others, I'd never come across before.
Also, I still don't understand the use of Peter to mean the first word of 20a. The only definition I can find for it is as in 'to peter out'. Looking for the rhyming pair was what enabled me to get this clue, as I also didn't twig the meaning of 'firth' until afterwards.
A minor quibble, but did anyone else think 1a was a bit dodgy, since the wine in question is not pronounced like that?!
COD was 23a.
As an aside, some people seem to be under the impression that the symbol for hug (14d) is a modern text/social media thing, but I can assure you it is not! I remember using it as a child in the 1960s/70s to end my letters. See here too:
https://www.washingtonpost.com/lifestyle/style/a-whole-lot-of-history-behind-x-and-o-kiss-and-hug/2014/02/13/0c3e218a-9341-11e3-b46a-5a3d0d2130da_story.html