What does the cryptic crossword clue "Puzzle had screw loose, or had cracked (10)" mean?

The definition is "Puzzle". The wordplay uses an anagram. anagram of HAD + SCREW + OR = WORDSEARCH; definition: "Puzzle" The answer is WORDSEARCH.

Puzzle had screw loose, or had cracked (10)

Guardian Cryptic #29146 | 4 Down | 2023-08-11 flower