The phrase "unclear instructions" refers to a situation where the given directions or guidelines are not clear, concise and easy to understand. It may mean that there is confusion about what needs to be done or how it should be accomplished. The instructions might lack important details, contain contradictory information, or use confusing language, making it difficult for individuals to follow them accurately. In such cases, the outcome of a task may not meet expectations and could lead to errors or delays due to the ambiguity in the given guidelines.