What does the cryptic crossword clue "A little decoy puzzled rodent (5)" mean?

The definition is "rodent". The wordplay uses a hidden word. Hidden in "a little deCOY PUzzled rodent" The answer is COYPU.

A little decoy puzzled rodent (5)

Independent Cryptic #11621 | 22 Down | 2024-01-09 flower