
1) An oilman 2) Crude employee 3) Crude processor 4) Oil company employe 5) Oil company, often 6) Petroleum company role 7) Skilled worker 8) Trained worker 9) Worker with oil 10) Worker with oil, sugar, etc 11) Worker with sugar, oil, etc
Found on
https://www.crosswordclues.com/clue/refiner

• (n.) One who, or that which, refines.
Found on
http://thinkexist.com/dictionary/meaning/refiner/
Re·fin'er noun One who, or that which, refines.
Found on
http://www.encyclo.co.uk/webster/R/35

One who decorates bought-in glass blanks by cutting, engraving, gilding, enamelling etc.
Found on
http://www.great-glass.co.uk/glass%20notes/glossa-e.htm

[
n] - one whose work is to refine a specific thing
Found on
http://www.webdictionary.co.uk/definition.php?query=refiner
noun one whose work is to refine a specific thing; `he was a sugar refiner`
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.