Answer:

pen

Answer	Crossword Clue
PEN	Compose
PEN	Escritoire item
PEN	Parker product

PEN	Shirt-pocket stainer
PEN	Sty
PEN	Hoosegow
PEN	Place to warm up
PEN	Waterman or Parker
PEN	Author's need
PEN	Corral
PEN	Enclosure

PEN	On one's ..
PEN	Pig's digs
PEN	Writer's need
PEN	Bull ..
PEN	Write
PEN	Bad thing to have break in your pocket
PEN	Confine
PEN	Animal house

PEN	Slammer
PEN	Autograph-seeker's need
PEN	Porkers' place
PEN	Calligraphy tool
PEN	Hog home
PEN	Lady swan
PEN	Instrument of authorship
PEN	Sword's superior?

PEN	Sword vanquisher
PEN	Prison
PEN	Confident crossword solver's tool
PEN	Confident crossword-solver's tool
PEN	Check-writer's need
PEN	Hog's home
PEN	Farm enclosure
PEN	Writer

PEN	Ballpoint
PEN	Sing Sing, e.g.
PEN	Sword's superior, in a saying
PEN	Confident crossword solver's choice
PEN	Ink holder