5 down
Abrasive,
turned
up
with
computer
peripherals
(6)
Abrasive, turned up with computer peripherals (6)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Abrasive — that's your rough volcanic rock. For the wordplay, "turned up" tells you to reverse up, giving you PU, and then tack on mice (computer peripherals, naturally) to get the full answer.