Failing to respect security classification (3,6)
I believe the answer is:
top secret
'security classification' is the definition.
(I've seen this before)
'failing to respect' is the wordplay.
'failing' indicates an anagram.
'to'+'respect'='torespect'
'torespect' anagrammed gives 'TOP-SECRET'.
(Other definitions for top secret that I've seen before include "(Of information) strictly not for public consumption" , "Well-hidden" , "Known to very few" , "As Bond mission" , "visible to hardly anyone?" .)