What a stinker!
It took me a few days to understand the preamble:
Each clue contains a one-word definition of the word required at
the number where it stands, but belongs as a whole to a word
of the same length elsewhere. Method recommended is to find,
after solving a clue, a definition of the solution in one of the other
clues to words of its length: this will show where the word is to go.