Cryptic crossword clue
Playing Nixon file for voice modulation 9

The most common and most likely answer to this crossword clue is the 9 letter word INFLEXION

I
N
F
L
E
X
I
O
N

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The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

What does INFLEXION mean?

INFLEXION noun
  1. (grammar) A change in the form of a word that reflects a change in grammatical function.
  2. A change in pitch or tone of voice.
  3. A change in curvature from concave to convex or from convex to concave.
  4. A turning away from a straight course.
  5. (optometry) diffraction

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