Cleric whose dog upset the tea (6)
I believe the answer is:
curate
'cleric' is the definition.
(I've seen this in another clue)
'dog upset the tea' is the wordplay.
'dog' becomes 'cur' (both can mean a despicable person).
'upset' is an anagram indicator.
'tea' with letters rearranged gives 'ate'.
'cur'+'ate'='CURATE'
'whose' is the link.
(Other definitions for curate that I've seen before include "He whose egg is good in parts" , "assistant barman in Ireland" , "one coming between vicar and his flock" , "Clergyman assisting a vicar" , "assistant rector" .)