What does the cryptic crossword clue "Easy to take in water? It gets knocked back (5)" mean?

The definition is "Easy to take in". The wordplay uses a reversal. reverse of EVIAN = NAIVE; definition: "Easy to take in" The answer is NAIVE.

Easy to take in water? It gets knocked back (5)

Times Cryptic #28739 | 20 Across | 2023-10-20 flower