Jar I smashed containing last of Barolo wine (5)
I believe the answer is:
rioja
'wine' is the definition.
(Rioja is an example)
'jar i smashed containing last of barolo' is the wordplay.
'smashed' indicates anagramming the letters.
'containing' indicates putting letters inside.
'last of' suggests the final letters.
The final letter of 'barolo' is 'o'.
'jar'+'i'='jari'
'jari' is an anagram of 'rija'.
'rija' enclosing 'o' is 'RIOJA'.
(Other definitions for rioja that I've seen before include "North Spanish wine" , "Spanish wine variety" , "kind of red" , "Popular Spanish wine" , "Spanish red wine" .)