Fellow creature is genial and flushed with liquor (7,6)
I believe the answer is:
kindred spirit
'fellow' is the definition.
(thesaurus)
'genial and flushed with liquor' is the wordplay.
'genial' becomes 'kind' (synonyms).
'and' is a charade indicator (letters next to each other).
'flushed' becomes 'red' (synonyms).
'with' is a charade indicator (letters next to each other).
'liquor' becomes 'spirit' (I have seen 'Distilled liquor' mean 'spirit' so perhaps 'liquor' could also mean 'spirit').
'kind'+'red'+'spirit'='KINDRED SPIRIT'
'creature is' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for kindred spirit that I've seen before include "one with a similar taste?" , "Like-minded person" , "Person with common interests" , "Having like-minded companion" , "Someone with the same attitudes as oneself" .)