It's very right that I do business (5)
I believe the answer is:
ideal
'it's very right that' is the definition.
'ideal' can be an answer for 'it's very' (thesaurus). I'm not sure about the remainder of the definition.
'i do business' is the wordplay.
'do business' becomes 'deal' (as in doing a business deal).
'i'+'deal'='IDEAL'
Can you help me to learn more?
(Other definitions for ideal that I've seen before include "Embodying perfection" , "Benchmark" , "Utopian; yardstick" , "Quite perfect, can't be improved on" , "Consummate" .)