Is this going to be another 'hare' where the issue is Guess What I'm Thinking?
We know what X stands for, since that is determined by the initials of omitted words (or at least the first part of these). The title suggests that what is required is the X of Someone Special. So my inclination would to get out the scissors, do some cutting, and then replace what is missing by a personal item. JG would be sent something he could put on his mantelpiece.
The idea of selecting four letters from the grid to produce a description of X is initially tempting, but it is very ambiguous. Nothing 'stands out' in the grid and there are lots of letters to choose from. For example, look at the bottom left corner. That cannot be right, surely.