Maker of Marina Volley trunks (6)

I believe the answer is:

speedo

(Other definitions for speedo that I've seen before include "Car mph/kph indicator" , "reading from this" , "It measures rate of progress" , "Trademark swimming briefs" , "Mph indicator" .)

I've seen this clue in The Washington Post.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.