Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.15
Broken: version: 2.82 (sub 1), branch: master, commit date: 2019-10-27 17:59, hash: rBdd904f67614b
Short description of error
[Please fill out a short description of the error here]
The clone brush requires you to copy a brush before you can use it. In Blender 2.80 you have a select menu in all submodes. In Blender 2.82 you miss the select menu without masking submode.
Now for the bug: without masking you can call the select tools by hotkey, but you can't use it. And this means that the clone tool requires to be in a selection mask mode so that you can select, copy and clone the brush.
Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]
Open Blender, create a grease pencil object. Switch to Sculpt mode. Activate the Clone brush. Press C to select what you want to clone. You can't.