Here are the possible solutions for top level projects clue
Answer
Clue
Relevancy
attics
Clue
Top-level projects?
Definition
ATTIC, a room in the roof of a house
ozone
Clue
Low-level pollution or high-level protection
Definition
an allotropic form of oxygen present in the atmosphere
ptomaineconcourse
Clue
Warning sign at a train station's food court? (NOTE: The original sign, without my additions, actually exists. It's in Grand Central Terminal in NYC, on the lower level — the food court level. The sig
