Mike with two Europeans consuming unknown appetisers (4)
I believe the answer is:
meze
'appetisers' is the definition.
'mike with two europeans consuming unknown' is the wordplay.
'mike' becomes 'm' (phonetic alphabet: alpha, bravo, charlie etc.).
'with two europeans' becomes 'ee' (I can't justify this - if you can you should believe this answer much more).
'consuming' indicates putting letters inside.
'unknown' becomes 'z' (algebra).
'ee' going around 'z' is 'eze'.
'm'+'eze'='MEZE'
(Other definitions for meze that I've seen before include "Mediterranean appetisers" , "Greek or Turkish starter selection" , "Greek appetiser" , "Mediterranean snacks" , "Selection of small dishes served in Greek or Turkish cuisine" .)