Headcanon that Clint and Bucky are utter bros because MCU Bucky clearly has an innate need to look after tragic blonds who get in too much trouble and he can’t look after Steve anymore because a) supersoldier and b) Steve is busy looking after everyone else. And then one day he sees Clint come in all bruised and battered and making bad jokes and is all like aha. yes. This one is now mine and I will look after it whether it likes it or not.