New enterprise -- a vet gets agent (14)
I believe the answer is:
representative
'agent' is the definition.
(thesaurus)
'new enterprise a vet' is the wordplay.
'new' indicates an anagram.
'enterprise'+'a'+'vet'='enterpriseavet'
'enterpriseavet' with letters rearranged gives 'REPRESENTATIVE'.
'gets' acts as a link.
(Other definitions for representative that I've seen before include "member of parliament, perhaps" , "MP" , "salesman?" , "Typical (of a class or group)" , "typical example" .)