10 across
Less
smooth
piece
of
sugar?
That
is
right
(7)
Less smooth piece of sugar? That is right (7)
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The definition is at the beginning of the clue.
How the clue works
Less smooth is your definition there, basically means more lumpy. Then build it up: LUMP is your piece of sugar, stick IE on for "that is", and finish with R for right — the lot together gives you the answer.