What does the cryptic crossword clue "Help a mere wreck that won’t live long (9)" mean?

The definition is "won't live long". The wordplay uses an anagram. anagram of HELP A MERE = EPHEMERAL The answer is EPHEMERAL.

Help a mere wreck that won’t live long (9)

Guardian Cryptic #29485 | 16 Down | 2024-09-11 flower