Minister, for short (3)
I believe the answer is:
rev
'minister for short' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rev that I've seen before include "One turn of an engine, in short" , "Clergy title" , "Gun (an engine)" , "Accelerate (abbrev.)" , "Clergyman, or woman (abbr)" .)