Answer:

BUR

Answer	Crossword Clue
BUR	Rough husk
BUR	Prickly husk
BUR	Sticky seedcase

BUR	Prickly clinger
BUR	Rough protuberance
BUR	Prickly seed casing
BUR	Nut case
BUR	Chestnut case
BUR	Prickly case
BUR	Prickly chestnut case
BUR	Rough case?

BUR	Forest sticker
BUR	Prickly seed case
BUR	Hikers may pick it out of socks
BUR	Hiker's sock clinger
BUR	Prickly casing
BUR	Prickly sock clinger
BUR	Cutting tool
BUR	Part of FBI

BUR	Prickly seedcase
BUR	Clingy husk
BUR	Rough case
BUR	Spiky plant part that sticks to your clothes
BUR	Sylvan sticker
BUR	Chestnut coating
BUR	Dental tool
BUR	Sharp seed coat

BUR	Saddle sticker
BUR	Drill bit
BUR	Sticker
BUR	Thorny seed cover
BUR	Prickly envelope of a fruit.
BUR	Prickly seed covering.
BUR	Sticker.
BUR	"Sticker" of a plant.

BUR	Pericarp.
BUR	Seedcase.
BUR	Prickly seedcase.
BUR	Seed case.
BUR	Neighbor of India: Abbr.