Answer:

blind

Answer	Crossword Clue
BLIND	Lacking any preparation
BLIND	Like some uncertain dates
BLIND	Like some turns and dates

BLIND	Like many taste tests
BLIND	23-Across ... according to Shakespeare
BLIND	... as a bat
BLIND	Window item
BLIND	Duck ...
BLIND	Window cover
BLIND	Word with date or trust
BLIND	Guided only by instruments

BLIND	Bird hunter's shelter