The most common and most likely answer to this crossword clue is the 6 letter word KEVLAR
K
E
V
L
A
R
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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 KEVLAR mean?
KEVLAR noun- An exceptionally strong, light, man-made fibre used to strengthen cables and sheet materials, e.g. in stab-resistant vests.
- A piece of personal protective equipment made from kevlar, such as a helmet or a vest.