Distance between a main measure and an ossia

[Dimitri Sykias]

"How can I adjust the distance between a main measure and an ossia measure? 
Here is the code for the ossia part:

% RIGHT HAND
right = \relative c'' {
  \global
  \textMark \markup {\circle \bold \larger "A"}
  d4 g,8 a b c | d4 g, g | 
  <<
    { e'4 c8\mordent d e fis} | 
    \new Staff \with {
      \remove Time_signature_engraver
      alignAboveContext = "right"
      \magnifyStaff #2/3
      firstClef = ##f
    }
    {  e4-5 c32-3 (b-2 c16-1 d8) e fis }
  >>

Additionally, I’m encountering the following issue:

Thank you in advance for your help!"