Cuba libre ingredient (4)
I believe the answer is:
coke
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cuba libre ingredient</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for coke that I've seen before include "Carbonised fuel residue" , "Fuel made from coal" , "Fuel derived from coal" , "Furnace fuel" , "Drink - drug - solid-fuel product" .)