Christian joined daughters in lift (9)
I believe the answer is:
methodist
'christian' is the definition.
(Methodist is an example)
'joined daughters in lift' is the wordplay.
'joined' becomes 'met' (meeting is a kind of joining).
'daughters' becomes 'd' (genealogical abbreviation for daughters).
'in' is an insertion indicator.
'lift' becomes 'hoist' (hoist can mean to lift something up).
'd' going into 'hoist' is 'hodist'.
'met'+'hodist'='METHODIST'
(Other definitions for methodist that I've seen before include "Protestant who follows teaching of John and Charles Wesley" , "Wesleyan" , "member of congregation?" , "Follower of John and Charles Wesley" , "Nonconformist" .)