Senior citizen flaying member of fighting force (5)
I believe the answer is:
oldie
'senior citizen' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for oldie that I've seen before include "Popular song from the past" , "forties film, say" , "pensioner" , "One getting on" , "Veteran" .)