Minor details (6)
I believe the answer is:
trivia
'minor details' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for trivia that I've seen before include "Trifles, unimportant details" , "Non-essential data" , "Unimportant or valueless things" , "Minor details" , "Useless information - trifles" .)