Crossword Genius

Also while putting two and two together (2,8)

Ross

I believe the answer is:

in addition

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'also' is the definition.
(synonyms)

'while putting two and two together' is the wordplay.
I cannot really understand how this works, but
an anagram of 'and' is 'nad' which is located in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Another definition for in addition that I've seen is " Also".)

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