Verbalise (7)
I believe the answer is:
express
'verbalise' is the definition.
(I know that verbalise can be written as express)
This is the entire clue.
(Other definitions for express that I've seen before include "Intimate - squeeze out" , "Speak - fast" , "Verbalise - very fast" , "Put into words - quick!" , "set forth" .)