Notable feature of large article on bird talk (7,3)

'notable feature' is the definition.
The definition and answer can be both body parts as well as being singular nouns.
Maybe there's a link between them I don't understand?

'large article on bird talk' is the wordplay.
I cannot quite see how this works, but
'large' could be 'l' (eg in clothes sizes) and 'l' is located in the answer.
'article' could be 'an' (indefinite article) and 'an' is located in the answer.
'bird' could be 'tern' (tern is a kind of bird) and 'tern' is present in the answer.
'talk' could be 'jaw' (jawing is a kind of talking) and 'jaw' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

'of' acts as a link.

Can you help me to learn more?