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' is an anagram indicator.
'for' is a charade indicator (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' 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" .)