What does the cryptic crossword clue "Whit appointment curtailed and put back (3)" mean?

The definition is "Whit". The wordplay uses a reversal. DAT (reversal="DAT") = TAD; definition: "Whit" The answer is TAD.

Whit appointment curtailed and put back (3)

Times Cryptic #29132 | 14 Across | 2025-01-21 flower