Sword that might harm a girl (7)

I believe the answer is:

cutlass

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'sword that might' is the definition.
'cutlass' can be an answer for 'sword' (type of sword). I'm not sure about the remainder of the definition.

'harm a girl' is the wordplay.
'harm' becomes 'cut' (cut is a kind of harm).
'a girl' becomes 'lass' (lass can informally mean a girl).
'cut'+'lass'='CUTLASS'

Can you help me to learn more?

(Other definitions for cutlass that I've seen before include "Pirate's weapon" , "Pirate's sword" , "Old sailor's sword" , "Short, heavy curved sword" , "Short curved naval sword" .)

I've seen this clue in The Irish Independent.

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