18 across
Cheer
gamer’s
device
(7)
Cheer gamer’s device (7)
hints
0
checks
0
hints
The whole clue is the definition (& lit or double definition).
How the clue works
Look at Cheer and gamer's device — both of these point straight to the answer on their own, giving you a double definition. To cheer someone is to console them, and a console is exactly what a gamer uses to play.