Track over information for virus? (8)
I believe the answer is:
pathogen
'virus?' is the definition.
(thesaurus)
'track over information' is the wordplay.
'track' becomes 'path' (synonyms).
'over' becomes 'o' (cricket abbreviation).
'information' becomes 'gen' (gen can informally mean information).
'path'+'o'+'gen'='PATHOGEN'
'for' acts as a link.
(Other definitions for pathogen that I've seen before include "source of disease" , "It makes us sick" , "cause of illness" , "Disease-causing agent" , "Disease-causing micro-organism" .)