Posted: 22/10/2014 at 10:40
Look on the bright side - if the clover wasn't there you'd just have a load of mud by the time the winter weather has finished with it.
Clover takes nitrogen from the air and fixes it in its roots, so when you kill it off and dig it in next spring it will provide nitrogen for your grass - just as a green manure would. In fact some varieties of clover are grown just for that purpose.
Explain to anyone who asks about your lawn that growing clover over the winter is intentional as it will provide long term benefits to the soil