Crossword puzzle clue "layer with a problematic hole"

Here are the possible solutions for layer with a problematic hole clue

Answer
Clue
Relevancy
ozone
Clue
Layer with a problematic hole
Atmospheric layer that has a problematic "hole"
Definition
an allotropic form of oxygen present in the atmosphere
icing
Clue
Layer-cake layer
Definition
a sweet mixture for covering cakes
strata
Clue
Layer upon layer
tier
Clue
Layer cake layer
arson
Clue
Problematic lighting?
Definition
the malicious or fraudulent burning of property
bigif
Clue
Problematic event
cain
Clue
Problematic firstborn
Definition
(Gaelic) a tenanted farm rent paid in kind, also KAIN, KANE

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