The most common and most likely answer to this crossword clue is the 8 letter word TRAINERS
I've seen this crossword clue in Independent
T
R
A
I
N
E
R
S
More clues leading to the result TRAINERS
- Things many might run in coaches
- Personal ones may wear these!
- Footwear riddle
- Teachers posing riddles, but not initially
- Coaches in running shoes
- Teachers seeing riddles initially dismissed
- To maximise performance, racehorses need these shoes
- Hesitation to board puff-puffs? Coaches must be the answer
- Coaches wear them out!
- Appropriate footwear for instructors
Buddy explains!

The straight part
We know that "Teachers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case teachers = trainers.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 TRAINERS mean?
TRAINERS noun- A person who trains another; a coach.
- A person responsible for treating injuries sustained by players during matches; a physiotherapist.
- A running shoe or sneaker.
- A patch for a video game that applies cheats.
- A piece of indoor equipment allowing a bicycle to be ridden while stationary.