Mythical revellers with a reputation for being drunk posed on summits for Yardbirds' record sleeves (6)
I believe the answer is:
satyrs
'mythical revellers' is the definition.
The definition and answer can be both people as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for satyrs that I've seen before include "Woodland deities who attended Bacchus" , "goat-like characters" , "Mythical woodland gods half-man and half-goat" , "Roman woodland gods or lustful men" , "Woodland gods, part men and part goats" .)