I am down to my last 5 and totally stuck!
10D about 29i adjusted to give pi (9)
r?????o?s
15A Poirot, refusing case in turn benefits from crime (5)
??c?e
17A Rain guages rearranged next to small African plant
g?i?e?/??a?s (6,5)
51A Divert odd characters away from harmful opponents at table (5)
a???e