Crossword puzzle clue "most common labor issue"

Most common labor issue

Labor issue?

They may result from Labor Day labor

"The most-played, most-imitated, most influential puzzler of all time," per the video game website IGN

Rare occurrence at the U.S. Open on Father's Day that's a common occurrence at the U.S. Open on Labor Day

Most important point at issue

Issue of most newspapers

The Library's Periodicals Room was the source of most of the excerpted material in the first issue of ___