Ordinary speech with a very different neural arc (10)
I believe the answer is:
vernacular
'ordinary speech' is the definition.
'vernacular' can be an answer for 'speech' (vernacular is a kind of speech). I'm not certain of the 'ordinary' bit.
'a very different neural arc' is the wordplay.
'a very' becomes 'v' (abbreviation).
'different' indicates anagramming the letters.
'neural'+'arc'='neuralarc'
'neuralarc' with letters rearranged gives 'ernacular'.
'v'+'ernacular'='VERNACULAR'
'with' acts as a link.
Can you help me to learn more?
(Other definitions for vernacular that I've seen before include "Everyday language" , "Native language" , "Local-style" , "Native tongue - dialect" , "Characteristic language" .)