I am writing a code for a counter and am using @cross statement to begin my count. But I wasnt to skip first few clcok cycles before I start my counter. Is there  a way to do this trick?

Use an integer variable active that you set/unset based on any condition you require, and have the counter only count when active is set.

Code:

parameter real tstart = 1u from [0:inf);
integer active;

analog begin
  if ($abstime > tstart)
    active = 1;

  @(cross(V(in)-0.5, +1))
    if (active)
	count = count + 1;

end 

The code that sets active can be anything, also a number of counts made, a signal on a terminal, etc.