Wash my kilt, spilling this? (4,6)

I believe the answer is:

malt whisky

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'this?' is the definition.
The definition suggests a singular noun which matches the answer.

'wash my kilt spilling' is the wordplay.
'spilling' indicates an anagram.
'wash'+'my'+'kilt'='washmykilt'
'washmykilt' is an anagram of 'MALT WHISKY'.

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(Other definitions for malt whisky that I've seen before include "nightcap" , "Distilled spirit" .)

I've seen this clue in The Independent.

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