What does the cryptic crossword clue "Hybrid of rodent and ox, very close! (4,4)" mean?

The definition is "close!". The wordplay uses an anagram. anagram of RODENT + OX, = NEXT DOOR; definition: "very close!" The answer is Next door.

Hybrid of rodent and ox, very close! (4,4)

Telegraph Prize Cryptic #3022 | 16 Across | 2019-09-22 flower