You can first define the distance and then use the delete command. Can anyone give a working example?
Example:
1. !find the nearest solvent molecule around the known point
!say xpos, ypos and zpos are the coordinates of the known fixed point in space.
coor mindist sele point @xpos @ypos @zpos end sele segid SOLVENT end
2. !calculate the minimum distance between them.
!note: MIND should plus a small number, e.g. 0.0001, in order to avoid zero selection later, !because of the different accuracy between the coor mindist calculation and ?MIND calculation.
calc distmin = ?MIND + 0.0001
3. ! make the deletion
delete atom sele .byres. point @xpos @ypos @zpos cut @distmin .and. segid SOLVENT end