Riddle-cryptic 29

This kind of paper basket's great for crumpled paper throws. / By itself, the word is formed from haste, or so the saying goes.

"You need to pick your battles!" holds a focus of conversation, / As does "Let's all stop ice cream mitigation!"

In discussing this word for bucolic, / The Russian said, "I know this word!" / His etymology was hyperbolic / Or more correctly, just absurd. / "My homeland's initial: the first letter. / The last four (nyet! let me speak!) / The source of them's even better. / They come from a Russian peak!"

When I write a book about this fluid, common sense I will not show. / I'll leave the index incomplete -- it'll only go from H to O.

Add a B to the end of this word for "Awesome!" (think of a flying man!) / And you'll produce another word for "Awesome!" (as said by an opera fan?).

Find somewhere an extra-large shirt, and read out loud its label. / If you do the verb that's sounded out, you're more than simply "able".