So, we know that it's probably quite cryptic.

The Balkan crisis has become a cryptic jigsaw puzzle.

Here's a clue.

I've often pondered his last words. They were so cryptic.

Nobody has a clue

It hasn't a clue.

She left no clue.

As in this cryptic sentence I found in The Guardian recently

Can you make anything out of this letter? It's pretty cryptic.

That gives you the clue.

I don't have a clue.

Latin America offers a clue.

I don't have a clue.

How are you so good at it? It's filled with cryptic words!

He was opaque and playfully cryptic, already a little paranoid perhaps justifiably so.

For I haven't got a clue

What's the clue to pursue?

Because he hasn't got a clue.

Other bookmarks showcased in the Naver Matome blog post are cryptic and sometimes unsettling.

Not just the earliest cryptic reference to four in the morning I can find.

But it didn't give them a clue.

Maybe those will give you a clue.

He needs one clue for problem solving.

The glass slipper is their only clue.

Sorry, Doc, I just don't have a clue.

And now it risks missing another important clue.

There was the end of this tangled clue.

And we had no clue where it was.

I'm going to give you a little clue.

But it didn't give them a clue. (Laughter)

It's good that she doesn't have a clue.

Like a tiny little bit. You've no clue.

You've got no clue. More than you, mister!

Well, there must be some sort of clue.

Well, the first clue came quite by accident.

Well, for a big clue, we turn to NANOG.

yes the Greek, of course, may furnish a clue.

Well, for a big clue, we turn to NANOG.

You're claiming stuff I don't have a clue about.

I really don't know. I don't have a clue.

Well, a little clue is this is a parallelogram.

You find a clue and follow it to death.

We call it the system of the irrelevant clue.

That too, shows that you don't get a clue.

I don't know which, but this is another clue.