War poet at work we must interrupt (4)
I believe the answer is:
owen
'war poet' is the definition.
'owen' can be an answer for 'poet' (I've seen this before). I'm unsure of the 'war' bit.
'at work we must interrupt' is the wordplay.
'at work' becomes 'on' (on can mean activated or working).
'must interrupt' indicates putting letters inside.
'on' enclosing 'we' is 'OWEN'.
Can you help me to learn more?
(Other definitions for owen that I've seen before include "English war poet, killed 1918" , "Wilfred -, English poet killed in World War One" , "Wilfred - - , WWI poet" , "'E won over the Welshman" , "Welsh boy's name" .)