User of scanning devices (4)
I believe the answer is:
poet
'user of scanning devices' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for poet that I've seen before include "'Paul Muldoon or Paula Meehan, say (4)'" , "author" , "Writer such as Ogden Nash" , "Rhymer" , "Heaney or Yeats, say" .)