Go over the limit, regularly being first to rant aboard bus (8)
I believe the answer is:
encroach
'go over the limit' is the definition.
I can't judge whether this defines the answer.
'regularly being first to rant aboard bus' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'first to' says to take the initial letters.
'aboard' is an insertion indicator.
'bus' becomes 'coach' (synonyms).
The first letter of 'rant' is 'r'.
The alternating letters of 'being' are 'en'.
'r' going into 'coach' is 'croach'.
'en'+'croach'='ENCROACH'
Can you help me to learn more?
(Other definitions for encroach that I've seen before include "Intrude on someone's territory or time" , "Gradually intrude (upon another's space)" , "'Trespass, infringe (8)'" , "Intrude on somebody's territory or time" , "Gradually intrude (on person's area)" .)