Served roast slab of flyer (9)
I believe the answer is:
albatross
'flyer' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'served roast slab' is the wordplay.
'served' indicates an anagram.
'roast'+'slab'='roastslab'
'roastslab' with letters rearranged gives 'ALBATROSS'.
'of' is the link.
Can you help me to learn more?
(Other definitions for albatross that I've seen before include "Large seabird or constant burden" , "something few golfers achieve" , "Spectacular hole" , "Sea bird" , "Coleridge's marine bird." .)