One with new ideas in turning round river reversed decay (9)
I believe the answer is:
innovator
'one with new ideas in turning round river reversed decay' is the definition.
I can't tell whether this defines the answer.
'in turning round river reversed decay' is the wordplay.
'turning round' is a reversal indicator.
'river' becomes 'avon' (I've seen this before).
'reversed' shows that the letters should be reversed in order.
'decay' becomes 'rot' (rot can mean to decay).
'avon' written backwards gives 'nova'.
'rot' reversed gives 'tor'.
'in'+'nova'+'tor'='INNOVATOR'
Can you help me to learn more?
(Other definitions for innovator that I've seen before include "Maker of change" , "Person who devises a new way of doing things" , "Fresh thinker" , "new ideas man" , "Pioneer" .)