Pound fare with seats often unavailable? (6)
I believe the answer is:
'pound' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for buffet that I've seen before include "Batter - refreshment counter" , "Self-service meal - pound" , "Self-service meal; strike" , "beat" , "Snack bar" .)