Motion to advance (6)
I believe the answer is:
beckon
This could be a double definition.
'motion to' is the first definition.
(thesaurus)
'advance' is the second definition.
The definition and answer 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?
Can you help me to learn more?
(Other definitions for beckon that I've seen before include "Signal forward" , "Make signs to summon" , "Summon by sign" , "Gesture to approach" , "Invite" .)