25 down
Phone
to
America
from
prison
(4)
Phone to America from prison (4)
hints
0
checks
0
hints
The whole clue is the definition (& lit or double definition).
How the clue works
The definition is phone — specifically the American term for a mobile, which gives you CELL. Prison does the same job from the other angle (a cell being a prison room), with "to America" just nudging you towards the Stateside usage in case you were thinking "mobile".