Crossword puzzle clue "piece of work found in this puzzle's longer entries"

Piece of work found in this puzzle's longer entries

Opus ___ (Catholic teaching also called "the Work, work work work work")

Period found in this puzzle's four longest entries

2015 Flo Rida hit whose letters can be found sequentially in this puzzle's three longest entries

Soft stuff found in this puzzle's four longest Across entries

Market found in seven of this puzzle's other entries

A synonym for it can be found inside this puzzle's four longest entries

Powder found in this puzzle's four longest entries