Choice of temperature in beer supported by Esher's last local (11)
I believe the answer is:
alternative
'choice' is the definition.
(synonyms)
'temperature in beer supported by esher's last local' is the wordplay.
'temperature in beer' becomes 'alte' (I am not sure about this - if you are sure you should believe this answer much more).
'supported by' is a charade indicator (letters next to each other) (in a down clue, some letters hold up others).
'last' indicates one should take the final letters.
'local' becomes 'native' (similar in meaning).
The final letter of 'esher' is 'r'.
'alte'+'r'+'native'='ALTERNATIVE'
'of' is the link.
Can you help me to learn more?
(Other definitions for alternative that I've seen before include "Substitute" , "One possible option" , "Available as another possibility" , "One of a number of possibilities" , "choice between 2" .)