The most common and most likely answer to this crossword clue is the 9 letter word CUIRASSES
C
U
I
R
A
S
S
E
S
More clues leading to the result CUIRASSES
Buddy explains!
The straight part
We know that "Chest protectors" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case chest protectors = cuirasses.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 CUIRASSES mean?
CUIRASSES noun- A piece of defensive armor, covering the body from the neck to the girdle.
- The breastplate taken by itself.
- (pedology) The armour-like crust that forms upon the exposure of a lateritic soil profile.