What does the cryptic crossword clue "Word of advice — try harder at first (4)" mean?

The definition is "Word". The wordplay uses acrostic. first letters of "of advice — try" = OATH; definition: "Word" The answer is OATH.

Word of advice — try harder at first (4)

Times Cryptic #29120 | 13 Across | 2025-01-07 flower