Answer:

SPY

AnswerCrossword Clue
SPYLe Carre character
SPYMole
SPYCompany man?
SPYFollett figure
SPYInvestigate intensively
SPYOperative
SPYSecret agent
SPYMata Hari, e.g.
SPYMata Hari, for one
SPYUndercover agent
SPYJulia Child, e.g., during World War II
SPYMad adversary
SPYPeep
SPYCovert operative
SPYSmiley, e.g.
SPYMole, e.g.
SPYAgent
SPYLudlum hero
SPYDo surveillance (on)
SPYGather intelligence
SPYMole, maybe
SPYAustin Powers, e.g.
SPYSomeone under cover
SPYBygone satire mag
SPYCatch sight of
SPYProhias protagonist
SPYAcquire intelligence
SPYIntriguing fellow
SPYFake-ID carrier, possibly
SPYGather info surreptitiously
SPYPerson who lies when asked "What do you do for a living?"
SPY"Harriet the ..." (children's book)
SPYLeader of a double life
SPYGain intelligence
SPYPlant, maybe
SPYStratego piece
SPY007, for one
SPYBond, for one
SPYCaleb was one
SPYDouble agent