Answer: spier

AnswerCrossword Clue
SPIEROne who observes
spierto inquire, also SPEER, SPEIR
spierperson who spies, watches, or discovers
SPIER"Baby-Sitters Club" secretary Mary Anne ...
SPIERLe Carr 's hero often
SPIERMary Anne in "The Baby-Sitters Club"
SPIERSecretive watcher
SPIERPerson with binoculars, maybe
SPIERScreen in a manor house
SPIEROne in disguise, using his eyes
SPIERScreen in a British manor house
SPIERInquisitive one
SPIEROne watching stealthily
SPIERWatcher
SPIEROne who snoops
SPIERSecret watcher.
SPIERWatcher.
SPIERObservant one
SPIERPeeper
SPIEROne who watches
SPIERPaul Pry
SPIERWatch man?
SPIERNosy one
SPIERPeeping Tom
SPIERMata Hari, e.g.
SPIERAgent, at times