Crossword puzzle clue "protective layer"

Here are the possible solutions for protective layer clue

Answer
Clue
Relevancy
bark
Clue
Tree's protective layer
Definition
to make a sound like a dog
enamel
Clue
Protective tooth layer
Definition
to cover with a vitrified coating
ozone
Clue
Protective layer
Protective atmospheric layer
Gas in a protective layer
Gas forming protective layer
Definition
an allotropic form of oxygen present in the atmosphere
shield
Clue
Protective layer
skin
Clue
Protective layer

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