Propeller engineer carries west (8)
I believe the answer is:
airscrew
'propeller' is the definition.
(airscrew is a kind of propeller)
'engineer carries west' is the wordplay.
'engineer' indicates an anagram.
'west' becomes 'w' ('W' can be a synonym of 'west').
'carries' with letters rearranged gives 'airscre'.
'airscre'+'w'='AIRSCREW'
(Other definitions for airscrew that I've seen before include "whirling blades" , "Part of plane" , "means of propulsion" , "Plane's propeller" .)