Clinch Strike

You've learned how to debilitate your enemies in close quarters. You gain the following benefits while you aren't wearing heavy armor or wielding a shield:

• Your unarmed strike uses a d4 for damage and you can apply your Sneak Attack damage when you hit with an unarmed strike even if it doesn't have the finesse property.
• You don’t need advantage on your attack roll to use your Sneak Attack if the target of your Sneak Attack is a creature grappled by you. All the other rules for the Sneak Attack class feature still apply to you.
• You can use the bonus action granted by your Cunning Action to make an unarmed strike against a creature you are grappling.

This feat is intended to require a level of Rogue to use (but D&D Beyond doesn't allow that prereq for homebrew), and is based off of a subclass feature from the fanmade Star Wars 5e (SW5e) system. Credit to those extremely dedicated creators for their hard work, creativity, and ingenuity.