What does the cryptic crossword clue "Stretches and ruptures, having dropped head (7)" mean?

The definition is "Stretches". The wordplay uses acrostic. REACHES (deletion) = REACHES; definition: "Stretches" The answer is REACHES.

Stretches and ruptures, having dropped head (7)

Guardian Cryptic #29462 | 4 Down | 2024-08-15 flower