Bird beside cafeteria pecking menthol cigarette butts (5)
I believe the answer is:
eagle
'bird' is the definition.
(eagle is a type of bird)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for eagle that I've seen before include "Keen-sighted bird of prey" , "The emblem of the US is bald" , "King of birds" , "Bird with hooked bill and long broad wings" , "Keen-eyed bird" .)