Computer (Dell) bisected by end of work station corners (7)
I believe the answer is:
desktop
'computer' is the definition.
(desktop computer is a kind of computer)
'station corners' is the wordplay.
'station' becomes 'desk' (I've seen this in another clue).
'corners' becomes 'top' (I can't justify this - if you can you should give a lot more credence to this answer).
'desk'+'top'='DESKTOP'
'dell bisected by end of work' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for desktop that I've seen before include "Background in computing" , "Main working area of PC" , "Office work surface" , "Location of icons" , "board?" .)