Deny any connection with row about Miss Piggy? (6)
I believe the answer is:
disown
'deny any connection with' is the definition.
(I've seen this before)
'row about miss piggy?' is the wordplay.
'row' becomes 'din' (both can mean a loud disturbance).
'about' means one lot of letters goes inside another.
'miss piggy?' becomes 'sow' (a sow is a female pig).
'din' enclosing 'sow' is 'DISOWN'.
(Other definitions for disown that I've seen before include "Refuse to be associated with (a person)" , "Forsake" , "Deny any connection with" , "Cast aside" , "Refuse to have anything to do with" .)