Wrap the saw properly (6)

I believe the answer is:

swathe

I'm a little stuck... Click here to teach me more about this clue!

'wrap' is the definition.
(I've seen this in another clue)

'the saw properly' is the wordplay.
'the saw' anagrams to 'SWATHE'.
However, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for swathe that I've seen before include "put bands around" , "row after reaping" , "Broad strip or area of something" , "Envelop" , "An enveloping bandage" .)

I've seen this clue in The Globe and Mail.

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