Answer:

MICRO

Answer	Crossword Clue
MICRO	Phone opening?
MICRO	Extremely small
MICRO	Very small

MICRO	Prefix for dot
MICRO	Teensy-weensy
MICRO	Itty-bitty
MICRO	Chip starter?
MICRO	Tiny
MICRO	Minute
MICRO	Scope opening
MICRO	Prefix with wave or scope

MICRO	Film introduction?
MICRO	Prefix with brewery
MICRO	Prefix with scope
MICRO	Small opening?
MICRO	Far from mega-
MICRO	Extremely tiny
MICRO	Minuscule
MICRO	Prefix with brewery or wave

MICRO	Prefix with brewery or processor
MICRO	Brewery opening?
MICRO	... Machines (toy cars made by Galoob)
MICRO	Smaller than small
MICRO	It means very little
MICRO	Prefix for a millionth
MICRO	Prefix with surgery or transmitter
MICRO	Prefix for -soft or -Prose

MICRO	Cosm or scope lead-in
MICRO	Extremely small: Prefix
MICRO	Brewery opening
MICRO	Wave starter?
MICRO	Management lead-in
MICRO	Prefix with biology
MICRO	Prefix with manage
MICRO	Start to manage?

MICRO	Brewery prefix
MICRO	Word form for "small"
MICRO	Prefix for economics
MICRO	Prefix for wave
MICRO	Smaller than mini