Crossword Genius

Note very loud Scene VI set out to provide potency (13)

Ross

I believe the answer is:

effectiveness

'potency' is the definition.
('effectiveness' can be a synonym of 'potency')

'note very loud scene vi set out' is the wordplay.
'note' becomes 'e' (musical note**).
'very loud' becomes 'ff' (musical abbreviation).
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'scene'+'vi'+'set'='sceneviset'
'sceneviset' anagrammed gives 'ectiveness'.
'e'+'ff'+'ectiveness'='EFFECTIVENESS'

'to provide' acts as a link.

(Other definitions for effectiveness that I've seen before include "Capability" , "Potency" , "Power to achieve results" .)

I've seen this clue in The Telegraph.
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