Whinny starts blasting our friend next door (9)
I believe the answer is:
neighbour
'friend next door' is the definition.
I can't judge whether this defines the answer.
'whinny starts blasting our' is the wordplay.
'whinny' becomes 'neigh' (synonyms).
'starts' indicates taking the first letters.
The initial letter of 'blasting' is 'b'.
'neigh'+'b'+'our'='NEIGHBOUR'
Can you help me to learn more?
(Other definitions for neighbour that I've seen before include "Fellow human" , "lovable person?" , "sit next to" , "possibly providing part of watch?" , "Person who livess near another" .)