Thought I had finished but confused, 29a legendary serpent that can kill with a breath is 'basilisk' but 20d concluding stanza in poetry is 'envoy' so they dont fit . Cant find an alternative spelling...
Stuck on the last one again 48 Down 'join together, merge' should be 'unite' but have 'consensus' for 47 across which leaves e-i-e Thanks for any ideas