Feeble argument about Thin Lizzy covers being very bad (15)
I believe the answer is:
blameworthiness
'very bad' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'feeble argument about thin lizzy covers' is the wordplay.
I cannot quite understand how this works, but
'feeble' could be 'thin' and 'thin' is located in the answer.
'about' could be 're' ('re' means regarding or about) and 're' is present in the leftover letters.
This explanation may well be incorrect...
'being' is the link.
Can you help me to learn more?
(Other definitions for blameworthiness that I've seen before include "Guilt" , "Culpability" .)