What does the cryptic crossword clue "Length of blade yet to turn up for saw (4)" mean?

The definition is "saw". The wordplay uses hidden reversed. Hidden reversed in "length of blaDE YEt to turn up for saw" The answer is Eyed.

Length of blade yet to turn up for saw (4)

Telegraph Prize Cryptic #3052 | 7 Down | 2020-04-19 flower