Refuse to be connected with (6)
I believe the answer is:
disown
'refuse to be connected with' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for disown that I've seen before include "Deny any connection with" , "Refuse to be associated with (a person)" , "Reject all connection or relationship with" , "Refuse responsibility for" , "Abnegate" .)