A fool in Congress (2,2)
I believe the answer is:
at it
'congress' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'a fool' is the wordplay.
'fool' becomes 'tit' (I've seen this in other clues).
'a'+'tit'='AT IT'
'in' is the link.
Can you help me to learn more?
(Other definitions for at it that I've seen before include "Active" , "working hard" , "Occupied (in crime?)" , "occupied in a particular way" , "Making love" .)