No shadow of a doubt the director of public prosecutions will appreciate this (10)
I believe the answer is:
conviction
This could be a double definition.
'no shadow' is the first definition.
The definition and answer can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'a doubt the director of public prosecutions will appreciate this' is the second definition.
The definition suggests a singular noun which matches the answer.
'of' is the link.
Can you help me to learn more?
(Other definitions for conviction that I've seen before include "No doubt" , "Strong belief" , "Certainty" , "it follows proof of guilt" , "Firm belief" .)