Man of God wants tea without milk or sugar? (8)
I believe the answer is:
chaplain
'man of god' is the definition.
(type of clergyman)
'tea without milk or sugar?' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'without milk or sugar?' becomes 'plain' (plain tea).
'cha'+'plain'='CHAPLAIN'
'wants' acts as a link.
(Other definitions for chaplain that I've seen before include "Member of clergy ministering to an organisation" , "Regimental clergyman" , "man of God" , "Member of the clergy, in 24 ac say" , "Clergyman attached to an institution, such as the army" .)