Pushes off (4)
'pushes off' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for goes that I've seen before include "SECOND PART OF 21" , "Moves" , "Disappears; runs" , "Works" , "Leaves; operates" .)
(Other definitions for repels that I've seen before include "Drives back or disgusts (6)" , "Forces back" , "Drives away from lepers" , "Disgusts or drives away" .)