A ranter bursting to tell story (7)
I believe the answer is:
narrate
'tell story' is the definition.
(I've seen this before)
'a ranter bursting' is the wordplay.
'bursting' indicates an anagram.
'a'+'ranter'='aranter'
'aranter' anagrammed gives 'NARRATE'.
'to' is the link.
(Other definitions for narrate that I've seen before include "Give a spoken account" , "Tell us the story" , "recount events" , "Give (film) commentary" , "Report; tell" .)