Saving Django formset with Many to Many Field

I'm building a little app with a formset that lets me enter a number of game scores each linking to a player via a many to many field. I'm having problems getting this to save properly with various errors. Basic code.

Model.py

class Player(models.Model):
    name = models.CharField(max_length=30)

    def __unicode__(self):
            return self.name

class Score(models.Model):
    score = models.DecimalField(max_digits=4, decimal_places=0)
    turn = models.ForeignKey(Turn)
    players = models.ManyToManyField(Player)  

    def __unicode__(self):
            return self.score

Each score is then joined to a turn but I haven't shown that bit.

Form.py

class NewScore(ModelForm):

    class Meta:
        model = Score
        fields = ('score', 'players',)

View.py

def newscore(request):

NewScoreFormSet = formset_factory(NewScore, extra=2)  

if request.method == 'POST':

    formset = NewScoreFormSet(request.POST)

    if formset.is_valid():

        t = Turn.objects.latest('id')

        for form in formset:

            p = form.cleaned_data.get('players')

            scoreSave = form.save(commit=False)
            scoreSave.turn = t
            scoreSave.save()
            scoreSave.players.add(p)


    else:
        print 'Formset not OK'

    return render(request, 'scorer/game.html',
                {})

else:

    formset = NewScoreFormSet()

    return render(request, 'scorer/game.html',
                {'formset': formset,})

The issue seems to be around getting the player saved through the many to many field and in this current setup I get the error message

TypeError: int() argument must be a string or a number, not 'QuerySet'

I have also tried removing the line

scoreSave.players.add(p)

but that just doesn't save the player at all. Just the score and turn.

Any help in why this won't save would be very helpful.

Many thanks

T