Perfect as the ale I’d brewed (5)
I believe the answer is:
ideal
'perfect' is the definition.
('ideal' can be similar in meaning to 'perfect')
'the ale i'd brewed' is the wordplay.
'brewed' indicates an anagram.
'ale'+'id'='aleid'
'aleid' anagrammed gives 'IDEAL'.
'as' is the link.
(Other definitions for ideal that I've seen before include "Model of excellance" , "unlikely to be bettered?" , "Benchmark" , "fanciful" , "Model of ethical behaviour" .)