Tuner fixed by friend in an impartial way (9)

I believe the answer is:

neutrally

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'in an impartial way' is the definition.
I can't tell whether this defines the answer.

'tuner fixed by friend' is the wordplay.
'fixed' is an anagram indicator.
'by' is a charade indicator (letters next to each other).
'friend' becomes 'ally' (an ally is a friend or supporter).
'tuner' is an anagram of 'neutr'.
'neutr'+'ally'='NEUTRALLY'

Can you help me to learn more?

(Other definitions for neutrally that I've seen before include "Displaying no bias" , "Impartially" , "In an inoffensive way" , "Without taking sides" .)

I've seen this clue in The Daily Express.

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