One's removed from a blue film, oddly culpable (8)

'culpable' is the definition.
(synonyms)

'one's removed from a blue film oddly' is the wordplay.
I cannot really see how this works, but
'from' could be 'e' (I've seen this in other clues) and 'e' is located in the answer.
'a' is found in the answer.
'film' could be 'm' (1931 Fritz Lang film) and 'm' is found within the answer.
This may be the basis of the clue (or it may be nonsense).