Teachers' paperback collection (3)
I believe the answer is:
set
This might be a double definition.
'teachers' paperback' is the first definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'collection' is the second definition.
(I know that set is a type of collection)
Can you help me to learn more?
(Other definitions for set that I've seen before include "Group of items of the same kind" , "Customary < scenery < a TV < series" , "Series of tennis games" , "Put down the group of games" , "Become fixed or solid" .)