Answer: pioneer

AnswerCrossword Clue
PIONEERDaniel Boone, notably
PIONEERJohn Glenn, for example.
PIONEEREarly American.
PIONEERDaniel Boone, for one.
PIONEERJohnny Appleseed was one
PIONEERYoung man (or woman) who went west
PIONEERAvant-gardist
PIONEERShow the way
PIONEERIndividual in dock is early arrival (7)
PIONEERNASA program that explored the outer planets
PIONEERDavy Crockett, e.g.
PIONEERInnovator
PIONEERColumbus, for one.
PIONEERFirst of a kind
PIONEERTrailblazing musician
PIONEERFirst in the field
PIONEERSettler
PIONEEREarly settler
PIONEERPathfinder
PIONEERFirst in a field
pioneerto be first in a new field of enterprise
pioneerearly arrival in new territory
pioneerto act as a pioneer
pioneerthe first one in any effort
PIONEERGo first
PIONEERNASA probe
PIONEERLeader
PIONEER.. 10 (first spacecraft to observe Jupiter)
PIONEERUnmanned planetary probe
PIONEERFirst mission to visit the outer planets
PIONEERTrailblazer
PIONEERConestoga wagon passenger
PIONEERConestoga wagon traveler
PIONEERConestoga rider
PIONEERWestern settler
PIONEERTrailblazing settler
PIONEERBreaker of molds
PIONEERPanasonic rival
PIONEERColonist.
PIONEERDaniel Boone's appellation.