CLUSTEROnrecordSet once, to “Knot” — The New York Times, Saturday, 15 January 2011.7 lettersOther answers to these cluesBRAINTEASER11 lettersBURL4 lettersENIGMA6 lettersGNARL5 lettersNODE4 lettersSKEIN5 lettersTIE3 lettersTIEA4 lettersTIEUP5 lettersUNITE5 letters