Wine bottles a tiny bit short caused uproar (6)
I believe the answer is:
rioted
'caused uproar' is the definition.
(a riot is uproar or unrest)
'wine bottles a tiny bit short' is the wordplay.
'wine' becomes 'red' (red is a type of wine).
'bottles' is an insertion indicator (bottle can mean to contain).
'a tiny bit' becomes 'iota' (an iota is a tiny piece).
'short' means to remove the last letter.
'iota' with its last letter taken away is 'iot'.
'red' enclosing 'iot' is 'RIOTED'.
(Other definitions for rioted that I've seen before include "went on rampage" , "Ran wild" , "Of crowd, ran amok" , "Of mob, ran wildly through the streets" , "Revolted" .)