What does the cryptic crossword clue "Lament returning unfinished crossword? (4)" mean?

The definition is "crossword?". The wordplay uses a reversal. DIRG (reversal="e") = GRID; definition: "crossword?" The answer is GRID.

Lament returning unfinished crossword? (4)

Independent Cryptic #11932 | 5 Down | 2025-01-06 flower