Good morning, a pretty straightforward "Chief whip" that leaves me with
three uncertain clues for which I would appreciate answers and parsing,thanks.
42 ( A ) Mean public schoolboy returns ( 6 ) : ?ET?T?
13 ( D ) Bash and decapitate viper over nothing (8) : ?C?A?I?N
30 ( D ) Meet judge probing a murder ( 6 ) : ?D?O?? ( ADROIT )