The most common and most likely answer to this crossword clue is the 6 letter word SPEEDO
S
P
E
E
D
O
More clues leading to the result SPEEDO
- Supreme idiot’s regularly forgotten clock
- Sailor comprehending what ocean is, turning dial
- Clock in square went round
- Very pissed, breaking the clock
- It provides only limited cover for what a driver needs
- Meter fitted to car went in thus
- A little gadget, which shows when you’ve stopped
- Clock Graf’s serve?
- Short term, it indicates what coach, perhaps, is doing?
- Make swimmers use very deep jumps up in this
Buddy explains!

The straight part
We know that "Make swimmers use" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case make swimmers use = speedo.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SPEEDO mean?
SPEEDO noun- A speedometer, particularly one in a race car or other automobile.
- A tight-fitting swimsuit, especially commonly worn by competitive swimmers and divers. Usually implies a brief or bikini style swimsuit.