Third yellow snake wriggling around might be over two feet (6)
I believe the answer is:
ankles
'over two feet' is the definition.
The definition and answer can be both body parts as well as being plural nouns.
Maybe you can see a link between them that I can't see?
'third yellow snake wriggling around' is the wordplay.
'third yellow' becomes 'l' (3rd letter of 'yellow').
'wriggling around' indicates anagramming the letters.
'l'+'snake'='lsnake'
'lsnake' with letters rearranged gives 'ANKLES'.
'might be' is the link.
Can you help me to learn more?
(Other definitions for ankles that I've seen before include "Body joints" , "Leg joints" , "Major foot joints" , "Low joints" , "Between legs and feet" .)