Challenge accepted: Can you solve this crossword clue about a sneaky organism?

The answer to this crossword question is “parasite“. By definition, a parasite is an organism that lives off another organism, known as the host. Parasites feed off their host to obtain nutrients and resources, often causing harm or weakening the host in the process. Examples of parasitic organisms include fleas, ticks, and tapeworms. Some parasites are also known to cause diseases in hosts, making them a significant concern for public health. Overall, parasites are fascinating but potentially dangerous organisms that play a vital role in the ecosystems in which they exist.