Crossword Genius

Perceptive observer's article about one way of voting (3-6)

Ross

I believe the answer is:

lip-reader

I'm a little stuck... Click here to teach me more about this clue!

'perceptive observer's article' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'about one way of voting' is the wordplay.
I cannot really see how this works, but
'about' could be 'rea' (I've seen this in other clues) and 'rea' is found in the answer.
'one' could be 'li' (I've seen this in other clues) and 'li' is present in the answer.
'way' could be 'e' (Compass direction - East) and 'e' is found in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Another definition for lip-reader that I've seen is " Person interpreting from mouth movements".)

I've seen this clue in The Times.
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