Clear portions of beer canned from blue cider (5)
I believe the answer is:
lucid
'clear' is the definition.
(similar in meaning)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for lucid that I've seen before include "Crystal clear" , "Readily understood" , "Transparently clear" , "Able to think clearly" , "Transparent" .)