
1) CBC Television show
Found on
https://www.crosswordclues.com/clue/eye-opener

• That which makes the eyes open, as startling news or occurrence, or (U. S. Slang), a drink of liquor, esp. the first one in the morning.
Found on
http://thinkexist.com/dictionary/meaning/eye_opener/
Eye opener That which makes the eyes open, as startling news or occurrence, or (U. S. Slang), a drink of liquor, esp. the first one in the morning.
Found on
http://www.encyclo.co.uk/webster/E/99

Eye-opener is slang for the first drink of the day, or first shot of a drug of the day.
Found on
http://www.probertencyclopaedia.com/browse/ZE.HTM

[
n] - an alcoholic drink intended to wake one up early in the morning 2. [n] - something surprising and revealing
Found on
http://www.webdictionary.co.uk/definition.php?query=eye%20opener

slang for the first drink of the day, or first shot of a drug of the day.
Found on
https://www.easypacelearning.com/english-books/slang-words-a-to-z/375-slang
noun something surprising and revealing
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.