What does the cryptic crossword clue "Love then break up? It's likely to be an illusion (5)" mean?

The definition is "Love". The wordplay uses a charade (building blocks). O (synonym="love") + PART (synonym="break up") = OPART The answer is OPART.

Love then break up? It's likely to be an illusion (5)

Independent Cryptic #11784 | 7 Down | 2024-07-17 flower