My last one is 5ac Ring road regularly is a monstrous thing (7)
I have C?O?E?A, though I am not sure about either the C or the E. Any hints gratefully received.
Once again I started late but although I found it relatively easy this week, there are a number I can't quite parse including 5d and 24,6, which is why I'm not sure about the letters in 5ac.