Tea taken with simple clergyman (8)
I believe the answer is:
chaplain
'clergyman' is the definition.
(chaplain is a kind of clergyman)
'tea taken with simple' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'taken with' is a charade indicator (letters next to each other).
'simple' becomes 'plain' (synonyms).
'cha'+'plain'='CHAPLAIN'
(Other definitions for chaplain that I've seen before include "Clergyman attached to military unit" , "Forces' clergyman" , "cleric" , "Member of the clergy attached to an institution" , "Member of clergy ministering to an organisation" .)