Say something angrily when you scratch yourself on (4)
I believe the answer is:
bark
'say' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for bark that I've seen before include "Cry of a dog or fox" , "A dog's shout" , "Animal sound - layer protecting tree trunk" , "Sound from animal < having part of tree" , "Hardly a sound from Tom" .)