Looked into bird nutrient myself (6)
I believe the answer is:
seemed
'looked' is the definition.
('seem' can be a synonym of 'look')
'into bird nutrient myself' is the wordplay.
'into' indicates putting letters inside.
'bird' becomes 'see' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'nutrient' becomes 'D' (D is an example).
'myself' becomes 'me'.
'see'+'d'='seed'
'seed' placed around 'me' is 'SEEMED'.
Can you help me to learn more?
(Other definitions for seemed that I've seen before include "'Appeared, gave the impression (6)'" , "Was appearing" , "Appeared, looked" .)