Definitions
1.NounA post bearing a sign that gives information on directions.
2.NounA word or phrase within a clue that serves as an indicator, rather than being fodder.
3.VerbTo install signposts on."The route wasn't signposted, and we got lost on the way."
4.VerbTo direct (somebody) to services, resources, etc.
To signal (something) intentionally, as if with a signpost.
5.VerbTo direct (somebody) to services, resources, etc.
6.VerbTo signal (something) intentionally, as if with a signpost.
7.VerbTo indicate (as the logical progress of a discourse) using words or phrases such as now, right, to recap, to sum up, as I was saying, etc.