Wanderer moaned about English leaving (5)
I believe the answer is:
nomad
'wanderer' is the definition.
(I know that Nomad is a type of wanderer)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for nomad that I've seen before include "A member of a wandering tribe" , "Roamer" , "Rover" , "Person of no fixed abode" , "Roving person" .)