One holding up a chopper? (5)
I believe the answer is:
rotor
This could be a double definition.
'one holding up' is the first definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'a chopper?' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for rotor that I've seen before include "Rotating part of machine" , "Revolving arm in machine" , "Revolving component" , "Flywheel" , "Device to propel a helicopter" .)