Consume Romeo in the auditorium (7)
I believe the answer is:
theatre
'auditorium' is the definition.
(I've seen this before)
'consume romeo in the' is the wordplay.
'consume' becomes 'eat' (eating is a kind of consuming).
'romeo' becomes 'R' (phonetic alphabet: alpha, bravo, charlie etc.).
'in' indicates putting letters inside.
'eat'+'r'='eatr'
'eatr' placed within 'the' is 'THEATRE'.
(Other definitions for theatre that I've seen before include "Audience" , "Major area of military activity" , "The rate (anag.)" , "Scene of operations or dramatic performances" , "Place of entertainment" .)