Female-fronted, multi-instrumentalist power trio The Accidentals (Sav Buist, Katie Larson, and Michael Dause) have released their newest single, “Heavy Flag.” Produced by Grammy-award winning producer John Congleton (St. Vincent, Lana Del Rey, The Decemberists), “Heavy Flag” is a focused combination of edgy indie rock, intelligent arrangement, and deeply compelling lyrics. Buist muses, “I wrote “Heavy …