The kind of officer for getting a seat back! (9)
I believe the answer is:
returning
'the kind of officer for' is the definition.
I can't judge whether this defines the answer.
'getting a seat back' is the wordplay.
'getting' becomes 'return' (return is a kind of getting).
'a seat back' becomes 'ing' (I can't justify this - if you can you should believe this answer much more).
'return'+'ing'='RETURNING'
Can you help me to learn more?
(Other definitions for returning that I've seen before include "Coming back" , "On the way back" , "Going or taking back" , "Yielding" .)