[Guest]

It swells, it grows, it rolls above a roll

Appears without effort, but does need control

It’s all consuming, you need to train it

When fully grown, so hard to restrain it

The breathy breadth, the full effect

You’d be impaired not to detect

(Now pay attention to the end of this ditty

To solve it, do know, it wants to be pretty)

So here’s one in my, it seems, most popular style. All clues fit equally well two unrelated correct answers. When you get them both, you will easily arrange them in a very well-known expression. So solve the riddle once, solve the riddle twice, and tell me when it’s done.

[plainglazed]

Just stopped in for a quick thought but now see I'm too late.

on a high note

Well deduced Framm 18. Much fun dancer.

[Framm 18]

Thanks PG, but it was your guess that gave me the first part.