No clues solved, in brief (7)
I believe the answer is:
counsel
'brief' is the definition.
(thesaurus)
'no clues solved' is the wordplay.
'solved' indicates an anagram (the anagram must be solved).
'no'+'clues'='noclues'
'noclues' is an anagram of 'COUNSEL'.
'in' acts as a link.
(Other definitions for counsel that I've seen before include "So uncle may give advice" , "kept by the secretive" , "Recommend - barrister" , "Legal advice" , "kept by the uncommunicative" .)