Answer: codename

AnswerCrossword Clue
CODENAMEOperation Overlord, e.g.
codenamea name used to conceal the identity of a plan or a person, also CODEWORD
CODENAMESecret moniker
CODENAMEPart of a cover
CODENAMEOperation Desert Fox, e.g.
CODENAMEA spy may use one
CODENAMESecret identity
CODENAMEOverlord, for D-day
CODENAMEAgent's cover
CODENAMEDeep Throat, for one
CODENAMEBarack Obama's is "Renegade"
CODENAMEFat Man or Abscam
CODENAMESpy's alias
CODENAMEManhattan Project, e.g.
CODENAMEAlias for a secret agent
CODENAMEAlias for an agent
CODENAMESpy's secret moniker