What does the cryptic crossword clue "It's child's play to bake epic turnover slice (7)" mean?

The definition is "It's child's play". The wordplay uses hidden reversed. hidden reversed in "to bake epic" The answer is PEEKABO.

It's child's play to bake epic turnover slice (7)

Guardian Cryptic #27692 | 1 Down | 2018-12-14 flower