Unexpected power in a classification of wine (6)
I believe the answer is:
abrupt
'unexpected' is the definition.
(I've seen this in another clue)
'power in a classification of wine' is the wordplay.
'power' becomes 'p' (symbol in physics).
'in' means one lot of letters goes inside another.
'classification of wine' becomes 'brut' (I am not sure about this - if you are sure you should believe this answer much more).
'a'+'brut'='abrut'
'p' inserted into 'abrut' is 'ABRUPT'.
Can you help me to learn more?
(Other definitions for abrupt that I've seen before include "Sudden, maybe discourteous" , "Sudden; hasty, curt" , "Curt; precipitous" , "using minimal language?" , "Sudden; precipitous" .)