In LR Classic can I edit (add or subtract) a clone?

[Newmarket2]

I'm trying to erase background using the clone stamp tool.

I don't see an automatic masking (is there one?) that would prevent drawing over an edge  in error, so I'm freehanding.  When I do, I will sometimes draw the stamp too far over an edge of the object I wasnt to keep.  Is there any way to edit the area of the clone?

[JohanElzenga]

The clone stamp tool is not part of the masking tools. It is an entirely different tool.

[SeanMcCormack · Accepted solution]

I assume you mean the Spot Removal tool. No, there's no way to mask with it. You can delete them or move them though. If it's a circular spot, you can drag the edge in or out, but not with drawn spots.