Hypocritical couple dealt with (3-5)
I believe the answer is:
two-faced
'hypocritical' is the definition.
(similar in meaning)
'couple dealt with' is the wordplay.
'couple' becomes 'two' (two people or things).
'dealt with' becomes 'faced' (facing is a kind of dealing with).
'two'+'faced'='TWO-FACED'
(Other definitions for two-faced that I've seen before include "Deceitful, double-dealing" , "Showing a double-sided visage to deceive" , "Double-dealing, like Janus?" , "Duplicitous" , "Deceitful or insincere - on the double?" .)