Zoom into the waveform where you hear a click.
If you see what looks like the waveform suddenly sliced off - like part of it was sliced out and the following audio butted up against it.
That's a digital dropout. It makes a click where the waveform is no longer continuous where the dropout occurred.
If on the other hand, you see continuous waveforms with the clicks superimposed on them - like the recording includes clicks.
Then it's some interference being recorded.
If it's the former (dropouts), you're going to want to investigate what's going wrong with your clocking. Do you have the master clock for the system selected properly? If you're connecting multiple digital devices, is everything in sync to the master clock correctly? If not operator error, start investigating any digital audio cabling.
You don't want to ignore gross digital dropouts if that's the root cause. Especially because there's likely a solution involving sample rate clocking setup.
As for the corrupted recording...
I'll put in another good word for iZotope RX.
Especially if these are digital dropout related clicks, you'll be able to dial iZotope RX in to remove only the clicks pretty easily.
You might even be none the wiser that there was ever a problem with the final result.
Look into fixing the root cause of this though. If it's dropouts, there will be a jitter effect from the non linearity introduced in the flow of time. Depth of field and sweetness of the sound start to collapse with that kind of stuff.
And of course, only go after fixing something like this if there's no chance to rerecord. A special performance. A great night with a live show. A musician on a studio project who might not be easy to book for a redo session. Just nailed a part and you're not redoing it and that's final! That kind of thing.
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