Gives information which could lead to making an arrest (8)
I believe the answer is:
narrates
'gives information' is the definition.
(narrating is a kind of giving information)
'could lead to making an arrest' is the wordplay.
'an arrest' can be anagrammed to 'NARRATES'.
However, I am not sure how this is indicated.
'which' is the link.
Can you help me to learn more?
(Other definitions for narrates that I've seen before include "provides an account" , "Tells (a story)" , "Recites, recounts" .)