Commit matricide in field? (6)
I believe the answer is:
domain
'field?' is the definition.
(synonyms)
'commit matricide in' is the wordplay.
I cannot quite see how this works, but
'in' is within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for domain that I've seen before include "Realm or range of influence" , "Range of influence or field of thought" , "Special region, area of expertise" , "Area under someone's control, field of activity" , "A district sphere of influence" .)