Harry arguing endlessly - language! (6)

I believe the answer is:

ugrian

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'language' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?

'harry arguing endlessly' is the wordplay.
'harry' is an anagram indicator (harry can mean to attack or spoil).
'endlessly' means to remove the last letter.
'arguing' with its final letter taken away is 'arguin'.
'arguin' is an anagram of 'UGRIAN'.

Can you help me to learn more?

(Another definition for ugrian that I've seen is " Magyar".)

I've seen this clue in The Independent.

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