A plane worker (9)
I believe the answer is:
carpenter
This might be a double definition.
'a plane' is the first definition.
I know that 'plane' relates to this answer. I also know that both the answer and definition are singular nouns
'worker' is the second definition.
(carpenter is a kind of worker)
Can you help me to learn more?
(Other definitions for carpenter that I've seen before include "Craftsman" , "Karen was one" , "artisan" , "Chippy" , "Find fault with record" .)