Think aloud? (3)
I believe the answer is:
say
'think' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for say that I've seen before include "Express in words" , "State; for instance" , "Articulate" , "Utter; for example" , "Verbalise" .)