Offence reduced financial support for part of Asia (5)

I believe the answer is:
sinai
'part of asia' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'offence reduced financial support' is the wordplay.
'offence' becomes 'sin' (a sin is an offence or transgression).
'reduced' means to remove the last letter.
'financial support' becomes 'aid' (I've seen this in another clue).
'aid' with its final letter taken away is 'ai'.
'sin'+'ai'='SINAI'
'for' is the link.
Can you help me to learn more?
(Other definitions for sinai that I've seen before include "One showing genetic change" , "Law handed down here" , "Mount where Moses received God's law" , "desert area" , "Peninsula, mostly desert, at north end of Red Sea" .)
