12 across
Space
put
by,
but
oddly
nothing
inside
(5)
Space put by, but oddly nothing inside (5)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The answer means having nothing inside, i.e. empty. In printing, an EM is a typographical space, and then taking the odd letters of "put by" (the P, T and Y) gives PTY. Put EM in front of PTY and you have EMPTY.