Depict duke fighting back (4)
I believe the answer is:
draw
'depict' is the definition.
(I know that depict is a action)
'duke fighting back' is the wordplay.
'duke' becomes 'd' (abbreviation).
'fighting' becomes 'war'.
'back' is a reversal indicator.
'war' back-to-front is 'raw'.
'd'+'raw'='DRAW'
(Other definitions for draw that I've seen before include "attractive thing" , "lottery?" , "Make lines on a surface" , "Make representation" , "Extract" .)