7 down
10s
in
wood?
(6)
hints
0
checks
0
hints
The whole clue is the definition (& lit or double definition).
How the clue works
This is a double definition. wood gives PLANKS directly, as planks are pieces of wood. 10s is a cross-reference to the answer for 10 across, which is FOOL — and PLANKS is a slang word meaning fools. The question mark hints at the slightly playful nature of the clue.