Tories oddly without passion in operations room (7)
I believe the answer is:
theatre
'operations room' is the definition.
(where surgical operations are carried out)
'tories oddly without passion' is the wordplay.
'oddly' means one should take alternating letters (letters in the odd-numbered positions are used).
'without' indicates putting letters inside ('without' can be similar in meaning to 'outside').
'passion' becomes 'heat' (synonyms).
The alternating letters of 'tories' are 'tre'.
'tre' placed around 'heat' is 'THEATRE'.
'in' acts as a link.
(Other definitions for theatre that I've seen before include "stage productions" , "place of action" , "Playhouse - operations room" , "Part of hospital" , "Surgeon can be seen here" .)