It lubricates complex gears, note (6)

I believe the answer is:

grease

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'it lubricates' is the definition.
The definition suggests a singular noun which matches the answer.

'complex gears note' is the wordplay.
'complex' indicates anagramming the letters.
'note' becomes 'e' (musical note).
'gears' is an anagram of 'greas'.
'greas'+'e'='GREASE'

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(Other definitions for grease that I've seen before include "Rock musical" , "Possible cause of slip-up" , "Thick lubricant or frying oil" , "Fully aware, astonished" , "Musical that sounds like a country" .)

I've seen this clue in the Evening Standard.

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