Answer:

tracer

AnswerCrossword Clue
TRACERPI or bullet
TRACERLost-package inquiry
TRACERMissing-persons investigator
TRACERRadioactive element, at times
TRACERShipping inquiry
TRACERDetective
TRACERBullet that leaves a trail
TRACERLost parcel inquiry
TRACERInquiry about a lost parcel
TRACERShipment inquiry
TRACERTracking of a missing parcel, e.g.
TRACERKind of bullet
TRACERPrivate eye, at times
TRACERDetective, at times
TRACERMissing person sleuth
TRACERLost-parcel locator
TRACERGumshoe, at times
TRACERMissing-person finder
TRACERPostal inquiry
TRACERLost-parcel searcher
TRACERSleuth, at times
TRACER... bullet.
TRACERTailor's tool.
TRACERArtist's instrument.
TRACERInquiry sent out for missing article.
TRACERInquiry for a missing article.
TRACERLetter of inquiry.
TRACERPost office inquiry.
TRACERInstrument for copying designs.
TRACERDetective of a kind.
TRACERStylus.
TRACERCertain troubleshooter.
TRACERKind of A.A. bullet
TRACERSkipper's pursuer
TRACER... bullets
TRACERInquiry into lost goods
TRACERDraftsman, for one
TRACERLost-article checker
TRACERPrivate detective
TRACER"Light" ammunition?