Ringing to find information kept in factory (8)
I believe the answer is:
plangent
'ringing' is the definition.
('plangent' can be a synonym of 'ringing')
'information kept in factory' is the wordplay.
'information' becomes 'gen' (gen is a kind of information).
'kept in' is an insertion indicator.
'factory' becomes 'plant' (I've seen this before).
'gen' placed within 'plant' is 'PLANGENT'.
'to find' acts as a link.
(Other definitions for plangent that I've seen before include "information to put around" , "Resonant, reverberating with mournful sound" , "Pathetic" , "Clamorous" , "Mournful-sounding" .)