Handy device, it's suspended in mid-air (6)
I believe the answer is:
mobile
I believe this clue is a double definition.
'handy device' is the first definition.
(portable phone)
'it's suspended in mid-air' is the second definition.
(as in a baby's mobile)
(Other definitions for mobile that I've seen before include "American city" , "American port" , "Able to get around" , "subject of hacking" , "US city" .)