What does the cryptic crossword clue "Learn art in case appearing crafty (9)" mean?

The definition is "Learn". The wordplay uses an anagram. anagram of ART + IN + CASE = ASCERTAIN; definition: "Learn" The answer is Ascertain.

Learn art in case appearing crafty (9)

Telegraph Prize Cryptic #3068 | 3 Down | 2020-08-09 flower