What does the cryptic crossword clue "Witty speech when replanting pear tree (8)" mean?

The definition is "Witty speech". The wordplay uses an anagram. anagram of PEAR + TREE = REPARTEE; definition: "Witty speech" The answer is REPARTEE.

Witty speech when replanting pear tree (8)

Guardian Cryptic #29064 | 17 Down | 2023-05-08 flower