Crossword Genius

Researching optimistic outlook (7,2)

Ross

I believe the answer is:

looking up

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'researching' is the definition.
(looking up is a kind of researching)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for looking up that I've seen before include "using a reference book?" , "Improving" , "How those lying see things" , "What is a star-gazer doing" .)

I've seen this clue in The Guardian.
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