'“Hey, settle a debate for me,” he says to the poor twenty-something that probably doesn’t get paid enough to deal with Clint.
Sam gives her a sympathetic look. “Clint, man, give it a rest—” he tries, but Clint will not be deterred.'

I was looking for Hawkeye fanfics, and this one popped up instead.
And it's not technically a Hawkeye fic, and it may have Sam and Bucky from The Falcon and The Winter Soldier (TFATWS)/MCU (Marvel movies) - but it's a shared universe, y'know?
OK, you got me. It's SamBucky.
...but the Hawkeye squad are here too!
Kate! Yelena! Clint!
All the sass!