Answer: paper

AnswerCrossword Clue
PAPEROn ... (in theory)
PAPERWriting medium
PAPERObservation, part 3
PAPERRock beater, in a game
PAPERWord before clip or cutter
PAPERKind of trail or route
PAPERWord with tiger or trail
PAPERPrinter filler
PAPERTribune or Post, e.g.
PAPERThe New York Times, e.g.
PAPERWashington Post, e.g.
PAPERGrocery bag option
PAPERPost or Times
PAPERRock cover?
PAPERComputer screen background
PAPERKind of chase or trail
PAPERMorning purchase
PAPERWall covering
PAPERStaples staple
PAPERPhotocopier supply
paperin theory rather than in practice
PAPERTiger not to fear
PAPERWord with Manila or India
PAPERDog-training site, perhaps
PAPERWritten composition
PAPERThe Globe, e.g.
PAPEROnionskin
PAPERPlastic alternative
PAPERFirst-anniversary tradition
PAPERRock beater
PAPERTreatise or essay
PAPERKind of trail or tiger
PAPERType of tiger or towel
PAPERResearch assignment
PAPERMorning buy
PAPEROffice supply
PAPERCollege assignment
PAPERCommuter's read
PAPEROrigami need
PAPERNotebook filler