What’s sticky and hard to throw away? (9)
I believe the answer is:
boomerang
'throw away?' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for boomerang that I've seen before include "Primitive weapon" , "Aboriginal projectile" , "Self-returning missile" , "Curved throwing stick" , "Recoil from" .)