Contrive (9)
(Other definitions for manoeuvre that I've seen before include "Skilful act or movement" , "plan" , "Work on possibly private" , "move smartly" , "Planned movement" .)
'contrive' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for engineer that I've seen before include "One who designs, makes or runs motors" , "Designer of machinery, structures etc" , "Practical technologist" , "He may be civil, mechanical or electrical" , "Bring about, being skilled in machinery" .)