What does the cryptic crossword clue "Trouble in plant causes the middle to collapse (5,3,7)" mean?

The wordplay uses an anagram. anagram of CAUSES + THE + MIDDLE = DUTCHELMDISEASE The answer is DUTCHELMDISEASE.

Trouble in plant causes the middle to collapse (5,3,7)

Daily Mail Cryptic #16896 | 2 Down | 2022-08-05 flower