You may refine this further:
use warnings;
use strict;

local $/ = "\n)\n";

while (<DATA>)
{
    my $got_end = chomp;
    s/\s*QUALIFIED$// unless m/^.*?clk\[\d+\]/;
    print;
    print $/ if $got_end; 
}

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In reply to Re^6: Substitute in a subparagraph by repellent
in thread Substitute in a subparagraph by guyov1

Title:
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