I feel defeated today. I still have 4 to answer and am really struggling. Google and Dictionary are not giving me the answers. 15a Person who gives interpretation of a text. E-E-E-E (7) 34a First of 2 movements made by a chorus in Greek drama S-R---E (7) 41a Relating to 1st 65 million years of Palaeozoic era C---R---(8) 23d In old classification those ungulates that do not ruminate P-C-Y-----T- (12) Many thanks to those clever people who found the answers please tell me where to look.
If the topic of the question is outwith your scope of knowledge, then a good place to look when you have several of the letters is in a crossword solver. You can either use a hand-held device or use an online one such as this one: