Answer: tradewind

AnswerCrossword Clue
TRADEWINDTropical cooler
TRADEWINDEquatorial zephyr.
TRADEWINDBoon to navigators.
TRADEWINDMonsoon's relative.
TRADEWINDMariner's concern.
TRADEWINDHorse latitudes feature
TRADEWINDAir movement on one regular course
TRADEWINDIt continually moves in the same direction