Stuff of legends (4)
'stuff of legends' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lore that I've seen before include "Folk knowledge" , "Tales of old" , "Ancient learning" , "Traditional knowledge" , "Wisdom" .)
(Other definitions for tales that I've seen before include "accounts" , "Lies" , "Stale kind of stories" , "Relations" , "Stories, perhaps tall ones" .)