Everyman 4000

[VivianD]

I'm glad I wasn't around for the first one! Can't see any theme, so far, but specifically:
5a Weak shell of elegant mollusc (6)
Also:
1a Casseroles, say, old and new, Vera smashed (8) anything to do with Vera Lynn?

[Toorak]

Limpet
Ovenware - anagram

[Toorak]

There was discussion about the theme earlier

https://www.theanswerbank.co.uk/Quizzes-and-Puzzles/Crosswords/Question1840676.html

Only click on the link if you want to know the theme - not if you want to work it out for yourself