Arena (12)
'arena' is the definition.
(I know that amphitheatre is a type of arena)
This is the entire clue.
(Other definitions for amphitheatre that I've seen before include "Theatre gallery seating area" , "Classical performance area" , "Roman tiered arena" , "Open auditorium" , "Large oval stadium with tiers of seats" .)
'arena' is the definition.
(I know that arena can be written as stadium)
This is all the clue.
(Other definitions for stadium that I've seen before include "Admit us (anag) - sports ground" , "eg Yankee, Wembley" , "Venue for sporting events, concerts etc" , "Large structure for open-air sports" , "Sports arena" .)