Put a wastepaper basket over part of a pen (3)
I believe the answer is:
nib
This might be a double definition.
'put a wastepaper basket' is the first definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'part of a pen' is the second definition.
(I've seen this before)
'over' is the link.
Can you help me to learn more?
(Other definitions for nib that I've seen before include "Writing point of old pen" , "Part of a fountain pen" , "Pen end" , "Writing tip of old pen" , "writer" .)