Dealing with cake that's seasonal without filling and topping (7)

I believe the answer is:

slicing

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'dealing with cake' is the definition.
I can't tell whether this defines the answer.

'seasonal without filling and topping' is the wordplay.
'without filling' says to hollow out the word (remove centre letters).
'and' is a charade indicator (letters next to each other).
'topping' becomes 'icing' (icing is a kind of topping).
'seasonal' with its middle removed is 'sl'.
'sl'+'icing'='SLICING'

'that's' acts as a link.

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I've seen this clue in The Guardian.

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