Crossword Genius

Good to spike cocktail of gin, decorating with sugar (8)

Ross

I believe the answer is:

glaceing

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'decorating with sugar' is the definition.
I can't judge whether this definition defines the answer.

'good to spike cocktail of gin' is the wordplay.
'good' becomes 'g' (abbreviation).
'to spike' becomes 'lace' (synonyms).
'cocktail of' is an anagram indicator (a mixture of the letters).
'gin' with letters rearranged gives 'ing'.
'g'+'lace'+'ing'='GLACEING'

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