Clint's got a plan to retire and go find himself a simple life at his family's old farm. Simple is good, right? Easy to remember. Simple is why he doesn't really mind that his soul-print has never activated, because a soulmate could only add another layer of complexity to his life.
And then the Winter Soldier turns up at his archery range on the Avengers base, and simple slips through Clint's fingers.
Post Age-of-Ultron (minus Clint's wife&kids) Soulmate AU.