Answer:

tipoftheiceberg

Answer	Crossword Clue
TIPOFTHEICEBERG	The part that shows
TIPOFTHEICEBERG	The 6-17-72 Watergate break-in report was just this
TIPOFTHEICEBERG	Tiny fraction

TIPOFTHEICEBERG	Hint of bigger things
TIPOFTHEICEBERG	Symbol of much greater hidden trouble
TIPOFTHEICEBERG	Visible part, belying ominous immensity
TIPOFTHEICEBERG	Big trouble's bit
TIPOFTHEICEBERG	The whole's small section
TIPOFTHEICEBERG	Little that's visible
TIPOFTHEICEBERG	Hardly everything
TIPOFTHEICEBERG	Small part that's visible

TIPOFTHEICEBERG	Arctic tern's nesting area?
TIPOFTHEICEBERG	Bit that's visible
TIPOFTHEICEBERG	Hint of the whole
TIPOFTHEICEBERG	Arctic tern's landing spot?