Yellow topped black (5)
I believe the answer is:
raven
'black' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for raven that I've seen before include "Crow-like bird" , "Glossy black colour" , "Largest member of crow family" , "Bird in 1's poem" , "Flyer" .)