What does the cryptic crossword clue "Poet, endlessly quiet and mischievous (7)" mean?

The wordplay uses a charade (building blocks). LARKI (synonym="LARKI") + SH (synonym="quiet!") = LARKISH The answer is LARKISH.

Poet, endlessly quiet and mischievous (7)

Guardian Cryptic #29276 | 23 Across | 2024-01-11 flower