To have at least a slightest knowledge about something
You can use this phrase in ………… language.
“Hi, Roger! What’s up? How’s the family?”
“Not so good. Kate and I, we’ve been separated for three months now, so I don’t get to see the children much.”
“I’m so sorry to hear that. I didn’t have a clue.”
“Why are you standing in the hall?”
“I heard some voices in the conference room. Do you have a clue what’s going on there?”
“A board meeting, I guess.”