18 down
I
complete
speaking,
getting
something
to
look
through
(7)
I complete speaking, getting something to look through (7)
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The definition is at the end of the clue.
How the clue works
"I" sounds like EYE and "complete" (whole) sounds like HOLE, with speaking flagging both as homophones — put them together and you've got your answer. The definition is something to look through, a peephole sort of thing.