Crossword Genius

Icing the problem? A rug's perhaps the answer (5)

Ross

I believe the answer is:

sugar

I'm a little stuck... Click here to teach me more about this clue!

'icing' is the definition.
(icing sugar is a type of sugar)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for sugar that I've seen before include "Basic sweetener" , "Common sweetener" , "Damn" , "Plantation product" , "rotter!" .)

I've seen this clue in The Globe and Mail.
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