Made bitter - beer a cat might order (8)
I believe the answer is:
acerbate
'made bitter' is the definition.
'acerbate' can be an answer for 'bitter' (thesaurus). I'm not certain of the 'made' bit.
'beer a cat might order' is the wordplay.
'beer a cat' can be anagrammed to 'ACERBATE'.
However, I'm not sure how this is indicated.
Can you help me to learn more?
(Other definitions for acerbate that I've seen before include "Put out" , "Exasperate" , "distress" .)