Making cues visible on parts but not on conductor's score

[Daryna Baikadamova]

I am processing an orchestral lilypond score.  I would like cues to appear just before an instrument start playing after a long rest, but only in parts, *not* the conductor's score.

As discussed before, I use a small driver lilypond script to produce each individual instrument part score.  To ensure cues only appear in parts, should I put the cues on a separate file and overlay it onto the instrument in my driver?  If so, could you please show me a short example doing that?

Thanks!

Daryna