Answer: annex

AnswerCrossword Clue
ANNEX

Add, as territory

ANNEX

Wing

ANNEX

Addition

ANNEX
Add
ANNEX
Take, as territory
ANNEXLibrary addition
ANNEXIt wasn't part of the original plan
ANNEX"Secret ..." (where Anne Frank wrote her diary)
ANNEXNew wing
ANNEXAttach
ANNEXTack on
ANNEXWing that won't fly
ANNEXSubsidiary building
ANNEXBuilding addition
ANNEXBuilding wing
ANNEXWing, perhaps
ANNEXAdd on
ANNEXArchitectural afterthought
ANNEXIncorporate
ANNEXExpansion consequence, perhaps
ANNEXTake over property
ANNEXIncorporate new territory
ANNEXSubjoin
ANNEXAdd to the city
ANNEXIncorporate, as land
ANNEXBuilding extension
ANNEXBring into the city limits
ANNEXIncorporate into a city, as territory
ANNEXTake without permission
ANNEXNot the main building
ANNEXEll
ANNEXAddition to a building
ANNEXForcibly acquire, as a territory
ANNEXTake in
ANNEXArchitect's wing
ANNEXTake by force, as land
ANNEXAddition to a school, say
ANNEXFast-growing school's need, perhaps
ANNEXArchitectural wing
ANNEXBuilding adjunct