Chicken in beer? Criminal! (2,6)
I believe the answer is:
al capone
'criminal' is the definition.
(I've seen this before)
'chicken in beer?' is the wordplay.
'chicken' becomes 'capon' (capon is a kind of chicken).
'in' indicates putting letters inside.
'beer?' becomes 'ale' (type of beer).
'capon' going into 'ale' is 'AL CAPONE'.
(Other definitions for al capone that I've seen before include "Famous gangster" , "criminal" , "Notorious gangster, d. 1947" , "Chicago mobster jailed for tax evasion" , "Hood" .)