I had no trouble with Goneril here but am sometimes stumped by clues that expect me to know things about Christianity.

I had g?n?r?l and e,i& o to fit in.

So genirol, genoril, ginerol, ginorel, goneril or gonirel? I had no idea at all. Of course I looked it up but very unhappy that knowledge of Shakespeare required. Not even someone that you might reasonably have heard of e.g Shylock, Falstaff.

Bay Rum is a cologne, used as far as I know by men. I once worked for a fellow who used it which is how I knew the name. It is made in Bermuda. “Brum” is a colloquial name for Birmingham (the British city, not the one in Alabama). I was unaware of how this name came about so just looked it up to learn that it is a short form of Brummagem which is the city’s name in its local dialect. The wordplay of the clue has “Lady regularly” meaning take the even letters in LADY (not a device I like much).

I did not think much of 13A either.

You will have to explain 20 down to me. Don’t know much about perfume or Birmingham.

Made a mistake with 4A. Had SWINGERS. It was the swinging 60s wasn’t it? I erroneously thought swinge-rs were not to be trusted.

Don’t like 13A much. Understand it, but don’t like it.
cheers
John

This was very straightforward and enjoyable.

If only I could have afforded the postage, I would have bunged this off as an entry for a prize.

I shall now start saving up, just in case.