What does the cryptic crossword clue "Bird in flight on knife-edge, rising (4)" mean?

The definition is "Bird". The wordplay uses a hidden word. Hidden reversed in "bird in flighT ON Knife-edge, rising" The answer is Knot.

Bird in flight on knife-edge, rising (4)

Telegraph Prize Cryptic #3112 | 25 Down | 2021-06-13 flower