Sort of long art gallery in church, perhaps (5,4)
I believe the answer is:
organ loft
'gallery in church perhaps' is the definition.
(space for a church organ)
'sort of long art' is the wordplay.
'sort' indicates an anagram.
'of'+'long'+'art'='oflongart'
'oflongart' with letters rearranged gives 'ORGAN LOFT'.
(Other definitions for organ loft that I've seen before include "Church feature" , "Church musician's gallery" , "Part of church" .)