Dividing up starters of Sally Lunn with sugary topping (7)

I believe the answer is:

slicing

'dividing up' is the definition.
(slicing something into parts)

'starters of sally lunn with sugary topping' is the wordplay.
'starters of' indicates taking the first letters.
'with' is a charade indicator (letters next to each other).
'sugary topping' becomes 'icing' (I've seen this before).
The first letters of 'sally lunn' is 'sl'.
'sl'+'icing'='SLICING'

I've seen this clue in The Independent.

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