
1) Block the sun, basically 2) Greek boy name 3) Latin American caste system 4) Model Laetitia 5) Words before spell or shadow
Found on
https://www.crosswordclues.com/clue/casta

Casta (lang, lang) is a Spanish and Portuguese term used in 17th and 18th centuries mainly in Spanish America and Spanish Philippines to describe as a whole the mixed-race people which appeared in the post-Conquest period. A parallel system of categorisation based on the degree of acculturation to Hispanic culture, which distinguished between gent...
Found on
http://en.wikipedia.org/wiki/Casta

(from the article `Latin America, history of`) ...finally, at the time of independence, the system collapsed under its own weight. The new categorizations were all at the intermediary level; ...
Found on
http://www.britannica.com/eb/a-z/c/33

Portuguese name for grape variety.
Found on
https://glossary.wein.plus/casta
No exact match found.