I'm responsible by turning up in crazy clothes? (2,3)
I believe the answer is:
my bad
'i'm responsible' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'by turning up in crazy clothes?' is the wordplay.
'turning up' says the letters should be written in reverse.
'in crazy' becomes 'mad' (synonyms. I am not sure about the 'in' bit.).
'clothes?' indicates putting letters inside (inserted letters are clothed in others).
'by' reversed gives 'yb'.
'yb' inserted inside 'mad' is 'MY BAD'.
Can you help me to learn more?
(Another definition for my bad that I've seen is " 4 [I STAND CORRESTED]".)