Grrrr. Thought I was going to finish this, but no....
18ac) I'm thinking this writer's againstsmall animals (7)
I have E?M??S
and
19ac) She had Diomedes twirling, see, like a piper! (7)
D?I?Y?E
Help, please - I need to go outside & get a life!!
Deipyle I like, very much: thank you, Danny. Dunno how Emmets would parse - and I've just realised I also haven't cracked
13ac) One applying to watch birds will do just that? (10)
for which I have S?O???R?S?.