Soldier in WW2 plane — a good person baling out (6)
I believe the answer is:
lancer
'soldier' is the definition.
(I know that lancer is a type of Trooper)
'ww2 plane a good person baling out' is the wordplay.
I cannot really see how this works, but
'a' could be 'an' and 'an' is present in the answer.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for lancer that I've seen before include "Cavalry soldier" , "Spearman (as in dance?)" , "Former cavalryman" .)