The most common and most likely answer to this crossword clue is the 10 letter word EMPENNAGES
E
M
P
E
N
N
A
G
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S
Buddy explains!
The straight part
We know that "rear sections of aircraft" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rear sections of aircraft = empennages.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does EMPENNAGES mean?
EMPENNAGES noun- The tail assembly of an aircraft.
- The feathers of an arrow or the tail fins of a bomb or rocket used to stabilize the longitudinal axis of the projectile parallel to the flight path.