Noisy criminal? (7)
I believe the answer is:
rustler
'criminal?' is the definition.
(rustler is a kind of criminal)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for rustler that I've seen before include "One who takes livestock" , "one whose stock-taking is dishonest" , "Horse thief" , "Stock taker?" , "lawbreaker" .)