Being French, I come to the right conclusion about a plane (3)
I believe the answer is:
jet
'a plane' is the definition.
(jet plane)
'being french i come to the right conclusion' is the wordplay.
'being french i' becomes 'je' (I can't explain this - if you can you should believe this answer much more).
'come to' means one lot of letters go next to another.
'conclusion' says to take the final letters.
The final letter of 'right' is 't'.
'je'+'t'='JET'
'about' is the link.
Can you help me to learn more?
(Other definitions for jet that I've seen before include "Narrow spouting stream" , "Rush" , "Sort of black" , "Raven" , "Black aircraft?" .)