The term 'Weathervane Turner' refers to a job that involves adjusting the direction of a weathervane in response to changes in the WIND. The two crossword solutions for this term are 'GUST' and 'WIND', both of which are four letters long. A GUST is a sudden, brief burst of WIND, while WIND is the movement of air from an area of high pressure to an area of low pressure. Both of these terms are integral to the job of a Weathervane Turner, as they indicate the direction in which the weathervane should be adjusted.