He may go to Aberdeen (5)
I believe the answer is:
angus
'he' is the definition.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for angus that I've seen before include "Steer" , "Aberdeen . . . . ., breed of cattle" , "A snug breed from Aberdeen" , "Scotsman" , "man" .)