Clearing a Nested QList: Risk of Memory Leak?

Is it necessary to clear all the inner lists to avoid a leak?:

class Instruction
{
    int opcode;
    int data1;
    int data2;

    bool Load(QTextStream* in);
    void Save(QTextStream* out) const;
};

class Interpreter
{
    QList<QList<Instruction>> steps;

    bool Load(QTextStream* file)
    {
        if(file_is_bad)
        {
            return false;
        }

        int end = steps.size();
        for(int i=0; i<end; i++)
        {
            steps.at(i).clear();
        }
        steps.clear();

        //now that it's clear, rebuild it from file
        return true;
    }
};

Or can I just call steps.clear(); and call it a day?

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(And here's some more text to get past the "too much code" error.)