cleanskin

noun6

1. •
   (Australia) An unbranded animal.

   • No one had any clear notion of how many head might be collected, but we counted on something over four hundred--possibly up to five hundred and fifty, including calves and cleanskins. — 1921
2. •
   Someone with no prior criminal record, a person with no previous convictions; loosely, someone who has not done anything wrong before, an unblemished character.

   • Ryan′s natural father was a cleanskin – a police term for a person with no criminal history – who found himself caught up in the world of career criminals when he married into The Clan. — 2007
3. •
   A person who does not have any tattoos.

   • If you're under 18 in Victoria you must now remain a cleanskin. The Government has just passed a bill that minors must not be tattooed with or without their parent's consent. — 1962
4. •
   (Australia, New-Zealand) An unlabelled bottle of wine.

   • In 2009, Back Label commissioned Voice to design a label for its cleanskin. — 2010
5. •
   A cricket bat with no maker's logo
6. •
   An undercover police officer who has not done a particular task before.