Clue: … hypocritical extramarital introduction there? (2,3,4,3,6)
Answer: MR POT MEET MRS KETTLE
Explanation: Definition: hypocritical extramarital introduction there?
=an expression used in response to hypocrisy
 cryptic wordplay refers to the extramarital MR and MRS who are kitchen items, since "there?"="in kitchen" from 13ac