Here are the possible solutions for problem sign clue
Answer
Clue
Relevancy
hissinthegrass
Clue
Sign of a lawn tractor problem?
oink
Clue
Sign of a pen problem?
Definition
to grunt like a hog
plus
Clue
Problem sign
Definition
to increase in value
smoke
Clue
Sign of an engine problem
squeak
Clue
Sign of a brake problem
omen
Clue
Good sign or bad sign
Definition
to provide with a prophetic sign
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