Squandered about a million once before your boss denied fellow culpability (15)
I believe the answer is:
blameworthiness
'culpability' is the definition.
(I know that culpability can be written as blameworthiness)
'squandered about a million once before your boss denied fellow' is the wordplay.
I cannot quite understand how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is found in the answer.
'million' could be 'm' (abbreviation) and 'm' is found in the answer.
'squandered' could be 'blew' ('blow' can be a synonym of 'squander') and 'blew' is present in the remaining letters.
'before' could be 'e' (I've seen this in other clues) and 'e' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for blameworthiness that I've seen before include "Culpability" , "Guilt" .)