Got upset about an Argentinian dance (5)
I believe the answer is:
tango
'argentinian dance' is the definition.
(I've seen this before)
'got upset about an' is the wordplay.
'upset' is an anagram indicator.
'about' is an insertion indicator.
'got' with letters rearranged gives 'tgo'.
'tgo' enclosing 'an' is 'TANGO'.
(Other definitions for tango that I've seen before include "musical piece" , "reputedly takes two" , "Dance originally from Buenos Aires" , "Dramatic ballroom dance from Argentina" , "Activity requiring two to" .)