Spook hiding information in case of accident (5)
I believe the answer is:
agent
'spook' is the definition.
(thesaurus)
'information in case of accident' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'in' is an insertion indicator.
'case of' means to remove the middle letters (outsides of).
'accident' with its middle taken out is 'at'.
'gen' put into 'at' is 'AGENT'.
'hiding' acts as a link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for agent that I've seen before include "Catalyst" , "One employed to incite others to commit illegal acts" , "Delegate" , "Actors' manager" , "Sales rep" .)