Answer:

tracers

AnswerCrossword Clue
TRACERSLocators
TRACERSShipping inquiries
TRACERSBullets with luminous trails
TRACERSRadioisotopes used in medicine
TRACERSKinds of ammo that leave a trail in the air
TRACERSLost persons seekers
TRACERSSlugs that leave trails
TRACERSSome bullets
TRACERSLost-parcel inquiries
TRACERSKinds of bullets.
TRACERSDetectives.
TRACERSInvestigators.
TRACERSInquiries for missing letters, packages, etc.
TRACERSInquiries of a sort.
TRACERSInvestigative procedures
TRACERSTecs, at times
TRACERSDetectives
TRACERSVisible bullets
TRACERSPeople who outline
TRACERSBullets leaving trails
TRACERSLost package inquiries