Crossword Genius

One paw may be raised in self-defence (6)

Ross

I believe the answer is:

weapon

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'raised in self-defence' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'one paw may be' is the wordplay.
'may be' indicates anagramming the letters.
'one'+'paw'='onepaw'
'onepaw' anagrammed gives 'WEAPON'.

Can you help me to learn more?

(Other definitions for weapon that I've seen before include "Implement to cause harm" , "Means of offensive action" , "club, perhaps" , "Thing used to inflict bodily harm" , "Fighting instrument" .)

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