Clubs put forward additional means of attack (8)

I believe the answer is:

claymore

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'of attack' is the definition.
The definition suggests a singular noun which matches the answer.

'clubs put forward additional' is the wordplay.
'clubs' becomes 'c' (abbreviation in card games).
'put forward' becomes 'lay' (as in laying or putting something down. I am not sure about the 'forward' bit.).
'additional' becomes 'more' (synonyms).
'c'+'lay'+'more'='CLAYMORE'

'means' is the link.

Can you help me to learn more?

(Other definitions for claymore that I've seen before include "Scottish two-edged sword" , "Two-edged broadsword" , "Scottish highlander's sword" , "Something that can cut" , "Scottish Highlanders' broadsword" .)

I've seen this clue in The Independent.

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