The way to get Dora upset (4)
I believe the answer is:
road
'the way' is the definition.
(road is a kind of way)
'dora upset' is the wordplay.
'upset' indicates an anagram.
'dora' anagrammed gives 'ROAD'.
'to get' acts as a link.
(Other definitions for road that I've seen before include "public highway" , "mine gallery" , "Way from A to B" , "Thoroughfare" , "Street" .)