Answer:

ELL

Answer	Crossword Clue
ELL	Blueprint extra
ELL	Building addition
ELL	Building extension

ELL	Building wing
ELL	Conduit bend
ELL	Right-angled pipe
ELL	Wing
ELL	Wren wing
ELL	Add-on
ELL	House addition
ELL	Pipe joint

ELL	Right angle
ELL	Wright wing
ELL	Addition
ELL	Alcove
ELL	Annex
ELL	Blueprint feature
ELL	Building expansion
ELL	Unfeathered wing?

ELL	Cockney's inferno
ELL	Bent pipe shape
ELL	Labial opening?
ELL	Orwell's last character?
ELL	Time will do it, they say
ELL	90-degree angle
ELL	Room shape
ELL	Extension

ELL	Pipe shape
ELL	Angled annex
ELL	Tetris shape
ELL	Corner shape
ELL	Pipe fitting
ELL	Building annex
ELL	Blueprint addition
ELL	Length of cloth

ELL	Home improvement?
ELL	Letter opener?
ELL	Plumber's joint
ELL	Right-angled bend
ELL	Building add-on

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.