Final answer:
The right in question is known as implied authority, which allows an agent to perform accepted practices not specifically outlined in a listing agreement related to the sale of a property.
Step-by-step explanation:
The right of an agent to do something in the sale of a property that is not specified in the listing agreement but is accepted practice is known as implied authority. This authority allows the agent to perform acts that are reasonably necessary to accomplish the purpose of the agency. In real estate, implied authority might include the agent's ability to advertise the property, hold open houses, or conduct similar activities generally associated with marketing a property, even if these specific tasks aren't outlined in the listing agreement. However, it's important for agents to operate within the bounds of their agency relationship and any applicable legal or ethical standards.