Entertainment venue, extremely ambivalent visiting that place (7)
I believe the answer is:
theatre
'entertainment venue' is the definition.
(I've seen this before)
'extremely ambivalent visiting that place' is the wordplay.
'extremely' says to hollow out the word (remove centre letters).
'visiting' means one lot of letters goes inside another.
'that place' becomes 'there' (as opposed to 'here' meaning this place).
'ambivalent' with its middle taken out is 'at'.
'at' placed into 'there' is 'THEATRE'.
(Other definitions for theatre that I've seen before include "Place for spectacles" , "Where dramas may be" , "Space for dramatic art and surgery" , "Part of hospital" , "Scene of military activity" .)