Analysis wasted on dark web (9)
I believe the answer is:
breakdown
'analysis' is the definition.
(breakdown is a kind of analysis)
'wasted on dark web' is the wordplay.
'wasted' indicates anagramming the letters.
'on'+'dark'+'web'='ondarkweb'
'ondarkweb' is an anagram of 'BREAKDOWN'.
(Other definitions for breakdown that I've seen before include "Problem with car" , "making you burst into tears?" , "Stop working" , "Stop running" , "Analysis < of separation" .)