Sign of a university in Iraq upsetting America (8)
I believe the answer is:
aquarius
'sign' is the definition.
(I know that Aquarius is a sign)
'a university in iraq upsetting america' is the wordplay.
'university' becomes 'U' (abbreviation for university).
'in' is an insertion indicator.
'upsetting' is a reversal indicator.
'america' becomes 'us' (United States).
'u' inserted into 'iraq' is 'irauq'.
'irauq' written backwards gives 'quari'.
'a'+'quari'+'us'='AQUARIUS'
'of' acts as a link.
(Other definitions for aquarius that I've seen before include "Star sign" , "A 23 ac" , "Sign of the Water-carrier - one of 12 Across" , "Zodiacal constellation" , "Sign of the zodiac, the water-bearers" .)