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His face was by her right ear, where she couldn't see what he looked like.

But right now he'd have to play it by ear.

So we'll play it by ear until we know the set up.

He turned to face his father, to play it by ear.

He would just have to wait and play it by ear.

Give her an hour, play it by ear if she left.

We'll just have to play it by ear for the moment.

From there on in, they would have to play it by ear.

I'd have to play it by ear when I got there.

"Is there a better time than another to approach, or should we just play that by ear?"