1: Cul-de-___ (dead end roads)
14: Phileas Fogg, for one
17: Unsuitable for surgery
20: Obscenity substitute, perhaps
36: Renege, slangily, with 'out'
37: Campaigned for office
40: International accords
45: Most painful to the touch
51: Bounce like a kangaroo
57: Horses bred by the Nez Perce