Clear-cut description of doubtful practices (5)
I believe the answer is:
sharp
This could be a double definition.
'clear-cut' is the first definition.
(I've seen this before)
'description of doubtful practices' is the second definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for sharp that I've seen before include "Acidic; smart and stylish" , "Liable to cut" , "Quick; pointed" , "Clearly defined (image)" , "Acute; pointed" .)