10a) Rings to get first book on production of eggs (9) o?e?????s
30d) Left a gnarly form of air passage (8) l?r?n?a? assume this must be an anagram of 'l a gnarly' but can't find anything to doublecheck.
Thank you all. Can see that I went wrong with another clue. I had a soil expert as a pedologist instead of an agronomist (so I was never going to get oogenesis with what I had!) Needed that 'g'!
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