Sentence:  And young Mr. Fleetwood Vibe was here at the <WSD>behest</WSD> of his father, Wall Street eminence Scarsdale Vibe, who was effectively bankrolling the Expedition. 
Meaning of the word marked with <WSD> tags:  A command, bidding; sometimes also, an authoritative request; (now usually in the phrase) '''at the behest of'''. (from 12th c.)