Crossword Clue:

Change from two to one

AnswerCrossword Clue
UNITEChange from two to one
WIDENChange, as from two lanes to three
WIDENChange, as from two lanes to four
ZENMASTERSQ: See title A: "Two--one to change it and one not to change it"
UNITEGo from two to one
MERGESGoes from two lanes to one
UNITEGo from two or more to one
STRETCHEDOUTWent from one seat to two, maybe