Very happy to find bird's nest, say (4)
I believe the answer is:
soup
'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" .)