Signs given by a teacher cycling south (6)
I believe the answer is:
augurs
'signs' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Maybe you can see a link between them that I don't see?
I don't understand the remainder of the clue.
(Other definitions for augurs that I've seen before include "Portends, foreshadows" , "Signs of things to come" , "Heralds" .)