Crossword puzzle clue "sunday dinner that's mixed up in four answers"

Sunday dinner that's "mixed up" in four answers

Pub drinks that are "mixed" at the starts of the four longest puzzle answers

Word that's "shifted" in the first four letters of the four longest answers

Angle irons graphically represented by four sets of black squares in this grid, and by letter formations starting in the four longest answers

Org. that has four teams with non-plural nicknames, which begin this puzzle's four longest answers

Joins forces, or the hidden four-letter words in four Down answers

Last Sunday, this Sunday

Key of U2's "Sunday Bloody Sunday"