Lead conquering rabble with bluster (14)

I believe the answer is:

grandiloquence

I'm a little stuck... Click here to teach me more about this clue!

'bluster' is the definition.
(thesaurus)

'lead conquering rabble' is the wordplay.
'lead conquering' can be anagrammed to 'GRANDILOQUENCE'.
Though, I am not sure how the anagram is indicated.

'with' acts as a link.

Can you help me to learn more?

(Other definitions for grandiloquence that I've seen before include "Pompous speech" , "Pompous style" , "Boastful speech" .)

I've seen this clue in the Sydney Morning Herald.

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