
1) White wine grape variety
Found on
https://www.crosswordclues.com/clue/sercial

Sercial is the name of a white grape grown in Portugal, especially on the island of Madeira. It has given name to the dryest of the four classic varieties of Madeira fortified wine. The grape is grown in diminishing quantities at the southern end of the island. After phylloxera devastated the Madeira`s vineyards the grape became more common on th....
Found on
http://en.wikipedia.org/wiki/Sercial

A grape variety used in the production of Maderia. Also refers to a particular style of Maderia made from that variety.
Found on
https://www.encyclo.co.uk/local/22313
No exact match found.