Don't give them an option of not cleaning. if it's a tot, make sure that you start small. They can't handle "pick up your toys" They need it broken down. "Pick up your blanket and put it on the bed' Then "pick up your firetruck and put it..." Start young so they know it's expected of them. As they get older you can make broader requests.
The fun stuff doesn't start until the work is done here. So, we get up, eat breakfast, get dressed and clean. After it's all done for the day, we'll play and have fun. We offer $2 per week allowance. She knows what's expected of her and what needs done and she is well aware of the consequences for not doing her part.