Composer who brewed beer, though whiskey went to his head (5)
I believe the answer is:
weber
'composer who brewed beer though whiskey went to his head' is the definition.
'weber' can be an answer for 'composer' (Carl Maria von Weber was a German composer). I am not sure about the remainder of the definition.
'composer who brewed beer' is the wordplay.
'composer who' becomes 'w' (I can't justify this - if you can you should give a lot more credence to this answer).
'brewed' indicates anagramming the letters.
'beer' with letters rearranged gives 'eber'.
'w'+'eber'='WEBER'
Can you help me to learn more?
(Other definitions for weber that I've seen before include "bit of magnetism" , "100,000,000 maxwells" , "Composer; physicist" , "physics unit" , "Carl Maria von ---, composer; Max ---, sociologist" .)