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Agitated sergeant-at-arms banishes setter for perplexing word puzzles (8)

Ross

I believe the answer is:

anagrams

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

'perplexing word puzzles' is the definition.
The answer and definition can be both related to communication as well as being plural nouns.
Maybe you can see a link between them that I can't see?

'agitated sergeant-at-arms banishes setter' is the wordplay.
'agitated' is an anagram indicator.
'banishes' suggests deleting specific letters.
'sergeant'+'at'+'arms'='sergeantatarms'
'sergeantatarms' with 'setter' removed is 'ganaarms'.
'ganaarms' with letters rearranged gives 'ANAGRAMS'.

'for' is the link.

Can you help me to learn more?

(Other definitions for anagrams that I've seen before include ""Sword" from "words" and "seraph" from "phrase", for example" , "Words made by rearranging the letters of others" , "Words turned into other words" , "Words with letters transposed to form other words" , "Mixed-up words as ragman have it" .)

I've seen this clue in The Irish Times.
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