Information of a strange nature (3)
I believe the answer is:
gen
'information' is the definition.
(gen can informally mean information)
'of a strange nature' is the wordplay.
'of' indicates the answer is hidden within the clue.
'GEN' can be found hidden inside 'strange nature'.
(Other definitions for gen that I've seen before include "Information (colloq.)" , "Informal information" , "Lowdown (sl.)" , "Info" , "Knowledge" .)