Don't take a vacancy (5)
I believe the answer is:
avoid
'don't take' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their base form.
Maybe there's a link between them I don't understand?
'a vacancy' is the wordplay.
'vacancy' becomes 'void' (synonyms).
'a'+'void'='AVOID'
Can you help me to learn more?
(Other definitions for avoid that I've seen before include "Eschew" , "Evade - escape" , "Stay clear of" , "Shy away from" , "Refrain from (something)" .)