Maniac reliant on upsetting Mexican, for example (5,8)
I believe the answer is:
latin american
'mexican for example' is the definition.
(I know this)
'maniac reliant on upsetting' is the wordplay.
'on' says to put letters next to each other.
'upsetting' indicates an anagram.
'maniac'+'reliant'='maniacreliant'
'maniacreliant' anagrammed gives 'LATIN-AMERICAN'.
(Other definitions for latin american that I've seen before include "like the samba?" , "possibly from Argentina" , "Relating to parts of the New World" , "Mexican, for example" , "Style of ballroom dancing" .)