A chopper with blades (10)
I believe the answer is:
helicopter
This clue could be a double definition.
'a chopper' is the first definition.
(synonyms)
'with blades' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
Can you help me to learn more?
(Other definitions for helicopter that I've seen before include "surveillance vehicle" , "One equipped with blades" , "aircraft" , "surveillance equipment" , "Flier" .)