Detects rare form of confidential process (5,6)
I believe the answer is:
trade secret
'confidential process' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'detects rare form' is the wordplay.
'form' is an anagram indicator (another form of the letters).
'detects'+'rare'='detectsrare'
'detectsrare' with letters rearranged gives 'TRADE SECRET'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for trade secret that I've seen before include "business confidence" , "competitive advantage" , "Some special skill" , "inside knowledge" , "Confidential commercial information" .)