Passion in Turner oddly shows (7)
I believe the answer is:
theatre
'shows' is the definition.
'passion in turner oddly' is the wordplay.
'passion' becomes 'heat' (synonyms).
'in' indicates putting letters inside.
'oddly' means one should take alternating letters (letters in the odd-numbered positions are used).
The alternating letters of 'turner' are 'tre'.
'heat' placed into 'tre' is 'THEATRE'.
(Other definitions for theatre that I've seen before include "Eg, Oxford's Sheldonian" , "Auditorium" , "Place for actors" , "Operating area" , "Venue for plays, films and surgery" .)