Barrow corporation bully regularly going to America (7)
I believe the answer is:
tumulus
'barrow' is the definition.
('tumulus' can be a synonym of 'barrow')
'corporation bully regularly going to america' is the wordplay.
'corporation' becomes 'tum' (I've seen this before).
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'going to' is a charade indicator (letters next to each other).
'america' becomes 'us' (abbreviation for the United States**).
The alternating letters of 'bully' are 'ul'.
'tum'+'ul'+'us'='TUMULUS'
(Other definitions for tumulus that I've seen before include "Ancient burial mound" , "burial-place" , "Ancient barrow" .)