Unimportant facts (6)
I believe the answer is:
trivia
'unimportant facts' 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 "Things of little importance" , "useless bits of information?" , "Useless facts" , "Useless information - trifles" , "Minutiae" .)