Answer:

spied

AnswerCrossword Clue
SPIEDActed the mole
SPIEDDid undercover work
SPIEDEmulated Mata Hari
SPIEDPeeked, in secret
SPIEDDid "Mission Impossible" work
SPIEDTook a peek
SPIEDCaught a look at
SPIEDCaught sight of
SPIEDSaw
SPIEDSpotted
SPIEDMade out
SPIEDWent undercover
SPIEDWorked undercover
SPIEDEmulated Bond
SPIEDWatched furtively, with "on"
SPIEDLooked through a knothole, say
SPIEDCaught a glimpse of
SPIEDGathered intelligence
SPIEDWas a mole, perhaps
SPIEDEngaged in espionage
SPIEDDug around, like a mole
SPIEDWorked furtively
SPIEDDid a Smart thing?
SPIEDEmulated George Smiley
SPIEDWorked for MI6
SPIEDWhat Aldrich Ames did
SPIEDWatched secretly
SPIEDEmulated a mole
SPIEDWorked behind enemy lines
SPIEDNoticed
SPIEDWas a double agent
SPIEDEmulated moles
SPIEDWatched from seclusion
SPIEDWas a mole
SPIEDActed as a mole
SPIEDWas on a stakeout
SPIEDDid secret-agent work
SPIEDEavesdropped, perhaps
SPIEDSought intelligence
SPIEDWorked for M