Show's former location (10)
I believe the answer is:
exposition
'show's' is the definition.
(I've seen this before)
'former location' is the wordplay.
'former' becomes 'ex' (prefix meaning former or onetime).
'location' becomes 'position' (synonyms).
'ex'+'position'='EXPOSITION'
(Other definitions for exposition that I've seen before include "fair" , "Public display" , "large show" , "Account" , "commentary" .)