Get rid of expression of error about a course associated with ingenuity (2,4,4)
I believe the answer is:
do away with
'get rid of' is the definition.
(synonyms)
'expression of error about a course associated with ingenuity' is the wordplay.
I cannot really see how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is found within the answer.
'a' is found in the answer.
'course' could be 'w' and 'w' is found within the answer.
'with' could be 'w' (short for with) and 'w' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for do away with that I've seen before include "scrap" , "Get rid of" , "scrub" , "Kill - destroy" .)