Piece of sticky paper (5)
I believe the answer is:
stamp
This might be a double definition.
'piece of' is the first definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'sticky paper' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for stamp that I've seen before include "Mark of approval" , "squash?" , "One has picture of Queen" , "Hallmark" , "Seal" .)