Ford Truck Lover

I have a leak very slight at or near clamps directly under left front of engine there is a small access hole to get at about 3"x 6" which looks tight to work on. Has anyone had this happen to them and what is best way to fix? The leak is slight although will leave a small amount of fuel on driveway at times and I would like to repair. The clamps look different than most fuelline clamps I have seen before. Are they available at most supply houses assuming it is just a clamp problem whic it has the appearance of?
Thanks
Marvin