Bits of ginger hair revealing true colour (5)
I believe the answer is:
roots
'bits' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Perhaps 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 roots that I've seen before include "a Wesker play" , "To find ancestry" , "Underground parts of a plant" , "one's ancestry" , "Cultural origins" .)