Count airmen attracted to gravitational pull (4)
I believe the answer is:
graf
'count' is the definition.
(German aristocratic title equivalent to count)
'airmen attracted to gravitational pull' is the wordplay.
'airmen' becomes 'RAF' (Royal Air Force).
'attracted to' is a charade indicator (letters next to each other).
'gravitational pull' becomes 'G' (as in G-force).
'raf' put after 'g' is 'GRAF'.
(Other definitions for graf that I've seen before include "German count - German tennis player" , "Seven-times women's Wimbledon champion, b. 1969" , "Steffi --, tennis champion" , "German tennis player, b. 1969" , "Noted tennis player" .)