Answer: tracker

AnswerCrossword Clue
trackeravel a comet tracking eastward
trackertravel over traverse track a desert
trackerfollow the groove undulations of a recording
trackermake tracks upon
trackerto follow the tracks or traces of trail
trackercarry (as mud) on the feet and deposit
trackerobserve or plot the moving path of (as a spacecraft or missile) often instrumentally
trackerfit a track or rails
trackerone who tracks (to follow the marks of an animal or vehicle)
trackersearch for by following evidence until found track down the source
trackerfollow by vestiges trace
trackermaintain a constant distance apart on the straightaway
TRACKEROnStar, notably
trackerleave tracks (as on a floor)
trackerkeep track of (as a trend) follow
trackerfollow accurately the corresponding fore wheel on a straightaway
TRACKERSpy gadget with a GPS chip
TRACKERDetective
TRACKERSleuth
TRACKERBloodhound, e.g.
TRACKERDetective, often
TRACKERSafari specialist
TRACKERDetective, at times
TRACKERBloodhound, at times