13 across
See
2
Down
(4,)
See 2 Down (4,)
hints
0
checks
0
hints
The whole clue is the definition (& lit or double definition).
How the clue works
The definition is See KEEP Down — a cross-reference pointing you to another clue in the grid whose answer is KEEP. Once you've tracked that down, you're looking for a synonym of KEEP (as in a place of confinement or something that catches and holds), which is what ties the two clues together.