Gun engine (3)
I believe the answer is:
rev
(Other definitions for rev that I've seen before include "Run (engine) quickly" , "serviceman?" , "Minister" , "Clergy title" , "In engine-room speed up" .)
I believe the answer is:
rev
(Other definitions for rev that I've seen before include "Run (engine) quickly" , "serviceman?" , "Minister" , "Clergy title" , "In engine-room speed up" .)