He may get beaten if he appears again (3)
I believe the answer is:
tom
'he' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for tom that I've seen before include "Repeated twice, this becomes an African drum" , "Queen's mate" , "What Dick Whittington had" , "Boy running off with pig" , "He is associated with Dick and Harry" .)