Crossword Genius

Rug nutter ruined in part of the King's Arms? (6,3)

Ross

I believe the answer is:

turret gun

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'part of the king's arms?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'rug nutter ruined' is the wordplay.
'ruined' indicates anagramming the letters.
'rug'+'nutter'='rugnutter'
'rugnutter' with letters rearranged gives 'TURRET-GUN'.

'in' is the link.

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I've seen this clue in The Independent.
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