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
redflag
Clue
Sign of danger — sign of socialism
stopahead
Clue
Pre-sign sign
aceofbase
Clue
Swedish pop group whose 1994 hit "The Sign" was #1 for six weeks
bruise
Clue
Sign of a big hit
Definition
to injure and discolour the skin
cfbs
Clue
Swedish group with the 1993 number one hit "The Sign"