Summary by editor withdrawn (10)
I believe the answer is:
abstracted
'withdrawn' is the definition.
(both can mean distracted or preoccupied)
'summary by editor' is the wordplay.
'summary' becomes 'abstract' (abstract is a kind of summary).
'by editor' becomes 'ed' (I am not sure about the 'by' bit.).
'abstract'+'ed'='ABSTRACTED'
(Other definitions for abstracted that I've seen before include "Taken out" , "Removed - preoccupied - absent-minded" , "without concentrating" , "Took off without permission" , "not paying attention" .)