Turned up a bit of information (4)
I believe the answer is:
data
'information' is the definition.
(thesaurus)
'turned up a bit' is the wordplay.
'turned up' shows that the letters should be reversed in order.
'bit' becomes 'tad' (I've seen this before**).
'a'+'tad'='atad'
'atad' back-to-front is 'DATA'.
'of' acts as a link.
(Other definitions for data that I've seen before include "Contents of some banks?" , "Series of measurements" , "Collected information" , "Facts and figures as fed to computers (4)" , "Numerical information" .)