Arrange severance of leg in attack (3,2)
I believe the answer is:
set up
'arrange' is the definition.
(I know that arrange can be written as set up)
'severance of leg in attack' is the wordplay.
I cannot really understand how this works, but
'attack' could be 'set' (setting is a kind of attacking) and 'set' is located in the answer.
The remaining letters 'up' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for set up that I've seen before include "Fool" , "a useful situation at tennis?" , "Assemble - design - establish" , "Contrived situation" , "Informally, the structure of an organisation" .)