Object to friend in a deliberate way (13)

I believe the answer is:

intentionally

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'object to friend' is the definition.
I can't judge whether this defines the answer.

'deliberate way' is the wordplay.
'deliberate' becomes 'intentional' (synonyms).
'way' becomes 'ly' (I can't explain this - if you can you should give a lot more credence to this answer).
'intentional'+'ly'='INTENTIONALLY'

'in a' acts as a link.

Can you help me to learn more?

(Another definition for intentionally that I've seen is " Following plan".)

I've seen this clue in The Daily Express.

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