Argument overt merit in poet (10)

I believe the answer is:

wordsworth

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'poet' is the definition.
(William Wordsworth, 1770-1850)

'argument overt merit' is the wordplay.
'argument' becomes 'words' (to have words with someone is to argue with them).
'overt merit' becomes 'worth' (merit can mean worth or value. I am not sure about the 'overt' bit.).
'words'+'worth'='WORDSWORTH'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for wordsworth that I've seen before include "writer" , "Poet (of the 20s)" , "Romantic poet" .)

I've seen this clue in The Everyman puzzle in The Observer.

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