Smitten mates put out inaccurate bit of information (12)
I believe the answer is:
misstatement
'inaccurate bit of information' is the definition.
(false statement)
'smitten mates put out' is the wordplay.
'put out' is an anagram indicator.
'smitten'+'mates'='smittenmates'
'smittenmates' with letters rearranged gives 'MISSTATEMENT'.
(Other definitions for misstatement that I've seen before include "Wrong assertion" , "Inaccurate remarks" , "incorrect account" , "Wrong utterance" .)