Six on crack team get permits (5)
I believe the answer is:
visas
'permits' is the definition.
The answer and definition can be both related to communication as well as being plural nouns.
Maybe there's a link between them I don't understand?
'six on crack team' is the wordplay.
'six' becomes 'vi' ('vi' can be a synonym of 'six').
'on crack team' becomes 'sas' (I am not sure about this - if you are sure you should believe this answer much more).
'vi'+'sas'='VISAS'
'get' is the link.
Can you help me to learn more?
(Other definitions for visas that I've seen before include "travel permits" , "They allow the bearer to enter a country" , "More than one travel document" , "They allow bearers to enter a country" , "Passport stamps permitting travel" .)