Put into words with great speed (7)
I believe the answer is:
express
'put into words' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for express that I've seen before include "Former journalists < not stopping < newspaper" , "set forth" , "Show" , "Train; utter" , "Intimate - squeeze out" .)