My experience with pads clunking in the caliper is that you never have to do anything about it.Fu** me sideways, swapped pads to pagid and it is sorted, the movement in the caliper with Brembo pads was nearly 4mm, no movement with pagid.
It's not unusual to have a gap, especially with aftermarket pads, but if you ignore the noise dirt and brake dust soon builds in the gaps and the noise stops.
More of an issue is the pads being too tight as it can stop them moving freely. Overheating brakes or uneven wear, much more undesirable than a little noise.