Crossword Genius

Engineer examined such a dramatic device (4,2,7)

Ross

I believe the answer is:

deus ex machina

'dramatic device' is the definition.
(type of narrative device)

'engineer examined such a' is the wordplay.
'engineer' is an anagram indicator.
'examined'+'such'='examinedsuch'
'examinedsuch' is an anagram of 'deusexmachin'.
'deusexmachin'+'a'='DEUS EX MACHINA'

(Other definitions for deus ex machina that I've seen before include "Unexpected problem solver" , "Happy-ending contrivance (Lat.)" , "Late delivery" , "An unlikely solution" , "unlikely device to resolve difficulty" .)

I've seen this clue in The Guardian.
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