Angry argument with lover upset you (9,6)

I believe the answer is:

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'upset you' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'angry argument with lover' is the wordplay.
'angry' becomes 'cross' (cross can mean annoyed or angry).
'argument' becomes 'words' (to have words with someone is to argue with them).
'with' says to put letters next to each other.
'lover' becomes 'olver' (I am not sure about this - if you are sure you should believe this answer much more).
'cross'+'words'+'olver'='CROSSWORD SOLVER'

Can you help me to learn more?

I've seen this clue in The Telegraph.

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