Appearance of fool attacked by bird, we hear (6)
I believe the answer is:
aspect
'appearance' is the definition.
(I know that aspect is a type of countenance)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for aspect that I've seen before include "Vista, panorama" , "Point of view or appearance" , "Viewpoint, feature to be considered" , "Feature; appearance" , "Distinct part or element" .)