America upset over homosexual embracing Republican? It's sweet (6)
I believe the answer is:
sugary
'sweet' is the definition.
(similar in meaning)
'america upset over homosexual embracing republican?' is the wordplay.
'america' becomes 'us' (United States).
'upset over' is a reversal indicator (knocked over).
'homosexual' becomes 'gay' (synonyms).
'embracing' is an insertion indicator.
'republican?' becomes 'r' (abbreviation in US politics).
'us' reversed gives 'su'.
'gay' enclosing 'r' is 'gary'.
'su'+'gary'='SUGARY'
'it's' acts as a link.
(Other definitions for sugary that I've seen before include "Over-sentimental" , "Excessively sweet or saccharine" , "Sweet, perhaps too much so" , "Sweet, syrupy" , "Excessively sentimental" .)