South Africa to override the Church in power? It makes me sick (9)
I believe the answer is:
influenza
'it makes me sick' is the definition.
'south africa to override the church in power?' is the wordplay.
I cannot really see how this works, but
'in' is present in the answer.
'south africa' could be 'za' (abbreviation for Zuid-Afrika) and 'za' is found in the answer.
This explanation may well be incorrect...
(Other definitions for influenza that I've seen before include "Common infection" , "Common viral disease" , "respiratory ailment" , "Highly infectious viral disease" , "Winter virus disease, even birds get it" .)