Refusal to accommodate crooked car dealer who breaks the law (5)
I believe the answer is:
narco
'dealer who breaks the law' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'refusal to accommodate crooked car' is the wordplay.
'refusal' becomes 'no' (saying no to something).
'to accommodate' is an insertion indicator.
'crooked' is an anagram indicator (a crooked or disrupted version of the letters).
'car' with letters rearranged gives 'arc'.
'no' enclosing 'arc' is 'NARCO'.
Can you help me to learn more?
(Other definitions for narco that I've seen before include "Drug trafficker" , "Drugs agent (US slang)" , "American drug agent" , "Member of US drugs squad" .)