Hi Stargull (& all)
Second letter of 6 eluded me too, but I realised it was "by" as in What's 8 by 5?
Not sure about 4a, but really enjoyed today's mix of difficulty.
Particularly liked 24A, 10D, 16d & 13d which was LOI.
Thank you, Everyman, and happy Sunday all (it's sunny here in Devon!)