16: Machine with a shuttle
18: Job for a grease monkey
20: Rolling stone's lack, proverbially
23: Companion of dark and handsome
34: Internet address letters
39: Extends shoe life, in a way
48: They're calling, in 'Danny Boy'
54: Sled dogs, as a group
65: Former athlete Darryl's ice cream preference?
67: Trees yielding elastic wood