Trifles (6)
I believe the answer is:
trivia
'trifles' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for trivia that I've seen before include "Unimportant facts" , "Useless information - trifles" , "Non-essential data" , "Unimportant things, minor matters" , "Unimportant or inconsequential things" .)