Crossword Genius

Very happy to find bird's nest, say (4)

Ross

I believe the answer is:

soup

I'm a little stuck... Click here to teach me more about this clue!

'find bird's nest say' is the definition.
I can't judge whether this definition defines the answer.

'very happy' is the wordplay.
'very' becomes 'so' (both can mean 'extremely').
'happy' becomes 'up' (I've seen this in other clues).
'so'+'up'='SOUP'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for soup that I've seen before include "Stolen plate melted down" , "Preliminary course" , "Eg, mulligatawny" , "Liquid - course" , "Bisque, for example" .)

I've seen this clue in The Telegraph.
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