Southern area with ultras all over the place (7)
I believe the answer is:
austral
'southern' is the definition.
('austral' can be similar in meaning to 'southern')
'area with ultras all over the place' is the wordplay.
'area' becomes 'a' (maths abbreviation).
'with' means one lot of letters go next to another.
'all over the place' indicates an anagram.
'ultras' anagrammed gives 'ustral'.
'a'+'ustral'='AUSTRAL'
(Other definitions for austral that I've seen before include "coming from Perth?" , "Southern - rat Saul (anag)" , "Of the southern hemisphere" .)