Failure to sleep in, as I'm no slacker (8)
I believe the answer is:
insomnia
'failure' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'sleep in as i'm no slacker' is the wordplay.
'in as i'm no' anagrams to 'INSOMNIA'.
However, I am unsure how the anagram is indicated.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for insomnia that I've seen before include "In restless state" , "Habitual sleeplessness" , "Wakefulness" , "Sleep disorder" , "Condition affecting sleep" .)