Cleared out jumble sale held by strange number from church (9)
I believe the answer is:
jerusalem
'number from church' is the definition.
(church hymn)
'cleared out jumble sale held by strange' is the wordplay.
'cleared out' means to remove the middle letters.
'held by' indicates putting letters inside.
'strange' becomes 'rum' (synonyms).
'jumble' with its middle removed is 'je'.
'sale' inserted into 'rum' is 'rusalem'.
'je'+'rusalem'='JERUSALEM'
(Other definitions for jerusalem that I've seen before include "See 17" , "Number of Women's Institute members" , "Knobbly edible tuber" , "Rousing anthem to words by William Blake" , "Holy city of Muslims, Jews and Christians" .)