Collective nouns group can also be types of fish within clue word:
pr IDE, convo CAT ion, s TENCH, SHAD ow, or was this just a red herring.

I've got to admit I hate terms of venery. They're just nonsense people made up and I wish people would stop using them (see https://www.audubon.org/news/no-its-not-actually-murder-crows). Like Pernickety, I was sure there was a fish connection in there because I saw "shad" and "tench"

Despite that objection the grid is pretty good.

Fair comments. I am not fishy though.