Place of worship a celebrant organised (10)
I believe the answer is:
tabernacle
'place of worship' is the definition.
(tabernacle is a kind of place of worship)
'a celebrant organised' is the wordplay.
'organised' indicates anagramming the letters.
'a'+'celebrant'='acelebrant'
'acelebrant' anagrammed gives 'TABERNACLE'.
(Other definitions for tabernacle that I've seen before include "Tent for the Ark of the Covenant" , "Place of worship; sacrament box" , "A celebrant (anag) - place of worship" , "Nonconformist church" , "Mormon temple" .)