expression, godan verb (-ku)
figure out; get an idea; have a rough idea
Used when you have a rough idea or a likely guess about something, often after some investigation or thought. Implies you have narrowed down possibilities.
犯人の目星がついた。
I have a rough idea who the culprit is.
次の旅行先の目星がついたら教
Let me know once you have an idea for the next travel destination.