Who won't need subtitles in remake of Pale Rider ? (3-6)

I believe the answer is:

lip-reader

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

'who' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'won't need subtitles in remake of pale rider ?' is the wordplay.
'pale rider' anagrams to 'LIP READER'.
Though, I am unsure how this is indicated.

Can you help me to learn more?

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

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.