He's good enough to brew tea for his dog! (6)
I believe the answer is:
curate
'he's good enough' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'brew tea for his dog' is the wordplay.
'brew' indicates an anagram.
'for' says to put letters next to each other (I've seen this in other clues).
'his dog' becomes 'cur' (I can't explain this - if you can you should believe this answer much more).
'tea' anagrammed gives 'ate'.
'ate' put after 'cur' is 'CURATE'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for curate that I've seen before include "Parson" , "He whose egg is good in parts" , "Organise exhibition" , "A truce for the church minister" , "look after collection" .)