I’m struggling to see 24a.
“Concerning friends return as time advances, mixture of hoppers and grunters (5)”
Removed letter/s is E, and I have *TAMR. I can only get STEAMER, which is re + mates reversed with the t advanced. But the definition eludes me. Hoppers and grunters and both types of trout fly, so STREAMER was possible, but there’s no space for the first R. The only other possibility might be METAMER/E, but I can’t get that to work either. Any ideas?