It would be right out of order to call this a flower (4)
I believe the answer is:
oder
'order to call this a flower' is the definition.
'oder' can be an answer for 'a flower' (River Oder in central Europe). I am unsure of the rest of the definition.
'it would be right out' is the wordplay.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'would' becomes 'od' (I can't explain this - if you can you should give a lot more credence to this answer).
'be right' becomes 'r' (common abbreviation).
'out' is an insertion indicator.
'od'+'r'='odr'
'e' inserted within 'odr' is 'ODER'.
'of' is the link.
Can you help me to learn more?
(Other definitions for oder that I've seen before include "River flowing into the Baltic" , "German banker" , "River that, with the Neisse, forms the German-Polish border" , "Rode around the European river" , "flowing water" .)