Answer: WIDER

AnswerCrossword Clue
WIDERMore spacious, in a way
WIDERMore ample.
WIDERAmpler
WIDERMore vast
WIDERMore extensive
WIDER"Open ... please"
WIDERNot so narrow
WIDERLess limited
WIDERWhat aging rockers get, perhaps
WIDERBadly Drawn Boy "... Than a Smile"
WIDERRequest from the dentist
WIDERMore broad
WIDERDentist's request, perhaps
WIDERMore extensive.
WIDERMore capacious, perhaps
WIDERDentist's instruction, sometimes
WIDERLike EE vis-a-vis E
widerof great size from side to side; broad
wideraway from an objective
widerhaving a specified width
widerto the utmost
widerWIDE, extending far
widerof great range
widerfar from an objective
widerover a large area
WIDERMore expansive
WIDERBroader
WIDERDentist's directive
WIDERDentist's request
WIDERComparatively spread out
WIDERDentist's urging
WIDERLike EEE, vis- -vis EE
WIDERLike two-lane roads, vis- -via one-lane roads
WIDERSafer, as a road
WIDERLike modern roads, vis- -vis older ones
WIDERHygienist's request
WIDERImproved, perhaps, as a road
WIDERAirbus A380, vis- -vis most other planes
WIDERMore outside, to an ump
WIDERMore spacious