Do wrong breaking into reserved wine (6)
I believe the answer is:
sherry
'wine' is the definition.
(sherry is a kind of wine)
'do wrong breaking into reserved' is the wordplay.
'do wrong' becomes 'err' (I've seen this in other clues).
'breaking into' is an insertion indicator.
'reserved' becomes 'shy' (I've seen this in other clues).
'err' going into 'shy' is 'SHERRY'.
(Other definitions for sherry that I've seen before include "Oloroso or amontillado?" , "Alcohol for the trifle" , "Fortified wine from Jerez" , "Wine from Spain's Jerez region, drunk as an aperitif" , "Wine from the Jerez region of Spain" .)