Gets round so one contacts (5)
I believe the answer is:
rings
'gets' is the definition.
The definition and answer 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 can't see?
'round so one contacts' is the wordplay.
'round' becomes 'ring' (synonyms).
'so one contacts' becomes 's' (I can't justify this - if you can you should believe this answer much more).
'ring'+'s'='RINGS'
Can you help me to learn more?
(Other definitions for rings that I've seen before include "Makes a circuit" , "Telephones" , "phones" , "See 12" , "that may circle planet (not ours)" .)