18 across
Little
kid
suppresses
surprising
cry
as
well
(2,4)
Little kid suppresses surprising cry as well (2,4)
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The definition is at the end of the clue.
How the clue works
The definition is as well, meaning "in addition." You take TOT (that's little kid) and stuff surprising cry — BOO — inside it, giving you T, BOO, T, which comes out as TO BOOT.