Cuts, I see, in less pieces (6)

'cuts' is the definition.
(slicing is a kind of cutting)

'i see in less pieces' is the wordplay.
'see' becomes 'c' (the word for the letter, according to Chambers).
'in' is an insertion indicator.
'pieces' indicates anagramming the letters (the same pieces in a new order).
'i'+'c'='ic'
'less' with letters rearranged gives 'sles'.
'ic' put into 'sles' is 'SLICES'.