Church without particular members is lacking in appeal (9)
I believe the answer is:
charmless
'lacking in appeal' is the definition.
(without charm or charisma)
'church without particular members' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'without particular members' becomes 'armless' (member can mean a limb).
'ch'+'armless'='CHARMLESS'
'is' acts as a link.
(Other definitions for charmless that I've seen before include "not winning" , "Lacking any appeal" , "Unattractive" , "Without attractive features" .)