Answer: expanse

AnswerCrossword Clue
EXPANSEStretch.
expansea wide area or extent
expansebroad, unbroken space
EXPANSETract
EXPANSEWide open place
EXPANSEUninterrupted space
EXPANSEGreat Plains, e.g.
EXPANSEGreat breadth
EXPANSELarge, open area
EXPANSELarge area
EXPANSEWide extent.
EXPANSEBig spread
EXPANSEStretch
EXPANSEVast space
EXPANSEVast area
EXPANSESpread
EXPANSEBroad area
EXPANSEWide open space
EXPANSEWide area
EXPANSESweep
EXPANSEWide-open space