Love movie nobody catches involving pair exclusively (3-2-3)

I believe the answer is:

one-to-one

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

'involving pair exclusively' is the definition.
I can't judge whether this definition defines the answer.

'love movie nobody catches' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'movie' becomes 'ET'.
'nobody' becomes 'no one' (not a single person).
'catches' is an insertion indicator.
'et' placed inside 'noone' is 'netoone'.
'o'+'netoone'='ONE-TO-ONE'

Can you help me to learn more?

(Other definitions for one-to-one that I've seen before include "meeting?" , "T?te-?-t?te" , "Corresponding uniquely, each to another" , "12:59" .)

I've seen this clue in The Guardian.

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.