What does the cryptic crossword clue "Create apprehension, having to remove blossom (6)" mean?

The wordplay uses a charade (building blocks). DIS (synonym="DIS") + MAY (synonym="May blossom") = DISMAY The answer is DISMAY.

Create apprehension, having to remove blossom (6)

Guardian Cryptic #29315 | 20 Down | 2024-02-26 flower