Answer:

wire

Answer	Crossword Clue
WIRE	Bug
WIRE	Hot-.. (start without a key)
WIRE	Tightrope

WIRE	Western Union transmission
WIRE	What croquet wickets are made of
WIRE	Hook up electronically
WIRE	Finish line
WIRE	Wallenda's walkway
WIRE	Philippe Petit prop
WIRE	Slinky, basically
WIRE	Electrical conductor

WIRE	Send, as money
WIRE	Bird perch, often
WIRE	Send, in a way
WIRE	Telegram
WIRE	Infiltrator's device
WIRE	Barbed ..
WIRE	Race terminus
WIRE	Lamp-to-plug link

WIRE	Cable
WIRE	Electrician's supply
WIRE	Spy's device
WIRE	Speaker-to-stereo link
WIRE	Spy wear, maybe
WIRE	Down to the ...
WIRE	Filament
WIRE	Bird's perch, perhaps

WIRE	Do an electrician's job
WIRE	One way to transfer money
WIRE	Bug, in a way
WIRE	Secrete a mike on
WIRE	Send a telegram to
WIRE	Bale binder
WIRE	It may be barbed
WIRE	Karl Wallenda's "path"

WIRE	Hide a mike on
WIRE	E-mail forerunner
WIRE	Hidden mike
WIRE	Slinky, essentially
WIRE	Bug part