Wicked types snarfing rat-arsed leader's Buds (7)
I believe the answer is:
friends
'wicked types' is the definition.
The answer and definition can be both people as well as being plural nouns.
Maybe you can see a link between them that I can't see?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for friends that I've seen before include "Intimate acquaintances" , "Pals, comrades" , "American sitcom" , "''..., Romans, countrymen, lend me your ears'' (Julius Caesar)" , "playmates!" .)