Church member meeting the Queen is a smoothie (7)
I believe the answer is:
charmer
'a smoothie' is the definition.
('charmer' can be a synonym of 'smoothie')
'church member meeting the queen' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'member' becomes 'arm' (arm is a kind of member**).
'meeting' says to put letters next to each other.
'the queen' becomes 'er' (Elizabeth Regina).
'ch'+'arm'+'er'='CHARMER'
'is' is the link.
(Other definitions for charmer that I've seen before include "witch?" , "One who delights others" , "One with personal attractiveness" , "Lothario?" , "Smoothie" .)