It captures criminals, with a fine outcome (5,6)
I believe the answer is:
small change
'it captures criminals' is the definition.
The definition suggests a singular noun which matches the answer.
'fine outcome' is the wordplay.
'fine' becomes 'small' (similar in meaning).
'outcome' becomes 'change' (change is a kind of outcome).
'small'+'change'='SMALL CHANGE'
'with a' is the link.
Can you help me to learn more?
(Other definitions for small change that I've seen before include "Coins of low value" , "Minor alteration in" , "Low denomination coins - a trifle - slight deviation?" , "hardly any difference!" , "Not much difference" .)