Sit back after English airman captures German in a flap (10)
I believe the answer is:
epiglottis
'flap' is the definition.
(I've seen this before)
'sit back after english airman captures german' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'sit' is 'tis' which is present in the answer.
'english' could be 'e' (abbreviation) and 'e' is found within the answer.
'german' could be 'g' (abbreviation) and 'g' is present in the answer.
'airman' could be 'pilot' (pilot is a kind of airman) and 'pilot' is located in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'in a' is the link.
Can you help me to learn more?
(Other definitions for epiglottis that I've seen before include "stop for a breather" , "Thin flap in the throat" .)