Take the defender, then attack its target.
A defended piece can become vulnerable if you capture its defender. Check what else protects the target and how the opponent can respond. The first capture is useful only if the full sequence improves your position.
Sacrifice your rook to win material
If the rook takes your rook, your rook can check. The full exchange in this line wins a bishop and a rook for a rook.
2 more clean runs (at any point) to reach Recall.