Familiar name of a northeastern delta (3)
I believe the answer is:
ned
'familiar name' is the definition.
The definition suggests a singular noun which matches the answer.
'northeastern delta' is the wordplay.
'northeastern' becomes 'ne' (abbreviation for northeastern).
'delta' becomes 'd' (phonetic alphabet: alpha, bravo, charlie etc.).
'ne'+'d'='NED'
'of a' is the link.
Can you help me to learn more?
(Other definitions for ned that I've seen before include "rough" , "A den for Edward" .)