Reaction making a duo cut loss (9)
I believe the answer is:
reduction
'reaction' is the definition.
(I know that reduction is a type of reaction)
'a duo cut loss' is the wordplay.
I cannot really see how this works, but
an anagram of 'cut' is 'uct' which is within the answer.
This explanation may well be incorrect...
'making' acts as a link.
Can you help me to learn more?
(Other definitions for reduction that I've seen before include "Lessening" , "Introduce (anag) - decrease" , "cut" , "Drop in price" , "from nine to five, for example" .)