I go armed correctly with a graphic symbol (8)
I believe the answer is:
ideogram
'graphic symbol' is the definition.
(symbol representing an idea)
'i go armed correctly' is the wordplay.
'correctly' indicates anagramming the letters.
'go'+'armed'='goarmed'
'goarmed' with letters rearranged gives 'deogram'.
'i'+'deogram'='IDEOGRAM'
'with a' acts as a link.
(Other definitions for ideogram that I've seen before include "Written character symbolising a concept or the thing itself" , "Symbol indicating idea of a thing, like number" , "Symbol indicating idea, like road sign" , "bit of kanji?" , "Symbolic character" .)