[John Suitcase]

What instrument is it on? If it's on vocals, is it only audible during pauses? If so, you'll just have to go in and edit them out, or reduce gain on them until they're inaudible.

You could try dropping a percussion track of some sort over it, might make it blend a little.

If you're working on a quiet acoustic song, and there's click on the guitar and vocal tracks, you may have to retrack.

If it's a rock tune, and the click is only on, say, the drum tracks, and only audible during breaks, I'd try to find the offending mic and selectively mute it.

I'd give more ideas, but I'd need to know more about the situation.