HMS , battleship launched in 1906 armed with ten 305mm guns (11)

I believe the answer is:

dreadnought

(Other definitions for dreadnought that I've seen before include "one of many tons made with strong defence" , "Vessel" , "Red and tough (anag.); battleship" , "Type of battleship" , "Large battleship" .)

I've seen this clue in The Mirror.

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