28 across
PC
D?
(7)
PC D? (7)
hints
0
checks
0
hints
The whole clue is the definition (& lit or double definition).
How the clue works
Two takes on the answer here. A PC can be a DESKTOP, and the second part, D?, is a cryptic nudge: the top (first letter) of DESK is D, so the D is the 'desk top'. The question mark flags the wordplay.