let the dog see the rabbit
Originates from hunting dogs, commonly a greyhound not knowing what to do until it sees it's prey "the rabbit". Ie it's clueless and doesn't know what to do or where to go until it spots the rabbit then it takes off with a purpose.
If you need to do something and people are in your way you say "let the dog see the rabbit". Ie. let me see what I'm meant to be doing.