Sorts information by date (6)
I believe the answer is:
genera
'sorts' is the definition.
(I know this)
'information by date' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'by' is a charade indicator (letters next to each other).
'date' becomes 'era' (I've seen this before).
'gen'+'era'='GENERA'
(Other definitions for genera that I've seen before include "classes" , "Taxonomic groups" , "Biological groups" , "Blood vessel" , "similar groups" .)