Say the wrong thing (3)
I believe the answer is:
lie
This could be a double definition.
'say' is the first definition.
The answer and definition can be both to do with communicating as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?
'wrong thing' is the second definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'the' is the link.
Can you help me to learn more?
(Other definitions for lie that I've seen before include "Stay hidden" , "situation" , "Whopper" , "Perjure" , "Fib in alienation" .)