Wood to throw outside for cutting (8)

I believe the answer is:

slashing

'for cutting' is the definition.
(slashing is a kind of cutting)

'wood to throw outside' is the wordplay.
'wood' becomes 'ash' (wood from an ash tree).
'to throw' becomes 'sling' (chuck means throw as does sling).
'outside' is an insertion indicator (some letters go outside others).
'ash' inserted into 'sling' is 'SLASHING'.

(Another definition for slashing that I've seen is " Cutting wildly".)

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

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