Go away and sing (4)
I believe the answer is:
scat
'go away' is the definition.
(informal term meaning to leave a place)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for scat that I've seen before include "Shoo!" , "One way of singing" , "vocal style?" , "Get away with cats" , "unwelcome person may hear this" .)