Stop making bread (5)
I believe the answer is:
debar
'stop' is the definition.
(I've seen this before)
'making bread' is the wordplay.
'making' indicates an anagram.
'bread' with letters rearranged gives 'DEBAR'.
(Other definitions for debar that I've seen before include "Exclude (from right)" , "Rule out" , "Stop" , "Blackball" , "Exclude from a place" .)