Sword penetrates a breast — just part of it (5)

I believe the answer is:

sabre

'sword' is the definition.
(sabre is a kind of sword)

'penetrates a breast just part of it' is the wordplay.
'just part of it' indicates a hidden word.
'SABRE' can be found hidden inside 'penetrates a breast'.

(Other definitions for sabre that I've seen before include "Walt --, cartoonist" , "Slasher" , "Heavy cavalry sword" , "Sword (that may be rattled)" , "Type of sword" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.