If I'm understanding your post correctly, you recorded voice[s] and now you're hearing the Metronome Click (beat thing??) during playback..? If that's the case, two possible scenarios..
1. The click is not actually recorded in the audio file recording along with the voice[s], it's just playing backâ€”in that case you can just turn it off during playback via the purple Metronome button at the upper right.
2. The mic actually picked up the click and it's part of the recording (though I'm not sure how that could happen without you being aware of it while the recording was being made)â€”if that is the case, though, you'll see the little spikes for the click in the audio waveform display. That would be a tougher problemâ€”two possible solutions:
2A. If the version of GB you're using lets you insert plug-ins, you could try inserting a Gate plug-inâ€”with the right Threshold setting a Gate could eliminate the sound of recorded clicks *when the voice[s] are not speaking*. If the voice[s] drown out the clicks when they *are* speaking, then that might do the trick. But if the clicks are audible *at the same time as the voice[s]*, the Gate can't help with that
2B. If recorded clicks are audible at the same time as the voice[s], then you'd need some kind of Audio Repair software to try and eliminate themâ€”some of the spectral editing modules in iZotope's RX7 might be able to do the trick, though it's big [$$$] complex program
If you can clarify your situation in more detail, I can try to point you in the right direction for more information..