Your best bet is probably with EQ. Unfortunately, pads tend to have very wide frequency ranges, so that presents a problem. But if you want to try, you can take the part with the pad only, invert the phase, and attempt to line it up with the first part. This will only work if the pad-only part is EXACTLY the same as the pad part in the first one. In this case, it will cancel out. But it's unlikely that will work out. Good luck.
If it's a pad with a lot of low frequencies, you can high-pass it, as long as you don't want a full-range voice (assuming it's a voice you want from the sample). In fact, this often sounds better regardless. Especially if the sample is over music. If the sample is during a time when there's very little else going on, a wider range will sound better, but if there's at least a moderate amount of music going on, you can high pass pretty far up and still sound good, thus cleaning out a lot of unnecessary sound.