Information gleaned from bid at auction (4)
I believe the answer is:
data
'information' is the definition.
(data are bits of information)
'gleaned from bid at auction' is the wordplay.
'gleaned from' indicates the answer is hidden within the clue.
'DATA' can be found hidden inside 'bid at auction'.
(Other definitions for data that I've seen before include "Collection of items of information" , "Facts and statistics collected together" , "Computer info" , "Collection of bits of information" , "Collection of facts, information" .)