Place for events in Rome, mainly about America (6)
I believe the answer is:
circus
'place' is the definition.
(thesaurus)
'mainly about america' is the wordplay.
'mainly' means to remove the last letter (virtually or mainly the word, but not all of it).
'about' becomes 'circa' (I've seen this before).
'america' becomes 'US' (United States).
'circa' with its final letter taken off is 'circ'.
'circ'+'us'='CIRCUS'
'for events in rome' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for circus that I've seen before include "Street formed in a circle" , "Ring entertainment" , "Open-air stadium of antiquity" , "Performances in ring" , "Roundabout for the animal acts" .)