Answer:

detect

Answer	Crossword Clue
DETECT	Emulate Ellery
DETECT	Sniff out, perhaps
DETECT	Ascertain

DETECT	Espy
DETECT	Make out
DETECT	Do gumshoe's work
DETECT	What gumshoes do
DETECT	Discover
DETECT	Find out about
DETECT	Imitate Ellery Queen
DETECT	Do a private eye's job

DETECT	Uncover
DETECT	Find
DETECT	Sense
DETECT	Ferret out
DETECT	Pick up on
DETECT	Spot
DETECT	Discover, a la Sam Spade
DETECT	Pick up

DETECT	Sniff out
DETECT	Discern
DETECT	Smell out
DETECT	Find out.
DETECT	Nero Wolf and Perry Mason do.
DETECT	What private eyes do.
DETECT	What Lupin and Dupin do.
DETECT	Discover.

DETECT	Espy.
DETECT	Spot: Colloq.
DETECT	Find out
DETECT	Observe.
DETECT	Emulate Columbo
DETECT	Emulate Magnum
DETECT	Do some sleuthing
DETECT	Descry

DETECT	Catch sight of
DETECT	Notice
DETECT	Catch the scent of
DETECT	Do a gumshoe's work
DETECT	Emulate Holmes

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.