Avoid Donald perhaps (4)
I believe the answer is:
duck
This clue is a double definition.
'avoid' is the first definition.
(ducking is a kind of avoiding)
'donald perhaps' is the second definition.
(donald duck is a cartoon character)
(Other definitions for duck that I've seen before include "Use one's wits to get something" , "Waterbird" , "Cringe maybe" , "Avoid (tricky question)" , "Water bird - get out of the way" .)