Aloof, check handset (6,7)
I believe the answer is:
remote control
'handset' is the definition.
(I know that handset can be written as remote control)
'aloof check' is the wordplay.
'aloof' becomes 'remote' (I've seen this before).
'check' becomes 'control' (synonyms).
'remote'+'control'='REMOTE CONTROL'
(Other definitions for remote control that I've seen before include "Channel-flipping device for a TV" , "Device for operating equipment from a distance" , "Device encouraging sedentary habits in TV watchers?" , "gadget" , "Portable device for operating TV etc" .)