Tool a divorcee returned (3)
I believe the answer is:
axe
'tool' is the definition.
(axe is a kind of tool)
'a divorcee returned' is the wordplay.
'divorcee' becomes 'ex' (I've seen this in other clues).
'returned' says the letters should be written in reverse.
'ex' back-to-front is 'xe'.
'a'+'xe'='AXE'
(Other definitions for axe that I've seen before include "US jazz instrument" , "Tool for chopping wood" , "Cut (jobs)" , "flower in Devon" , "Terminate - with a hatchet?" .)