MSY LCL CTLR CLRED ACFT FOR TKOF WITH TFC ON SHORT FINAL.

Narrative

FLT PUSHED BACK ON TIME FROM GATE IN MSY. TAIL WAS TOWARD RWY 10. AFTER START AND PRE-TKOF CHKS GND WAS CALLED FOR TAXI. INSTRUCTIONS WERE: 'TAXI TO RWY 1 CONTACT TWR.' A R TURN FROM PARKING WAS ACCOMPLISHED. CHK IN WITH TWR RESULTED IN THIS CALL FROM TWR 'COMPANY NUMBER; FLY RWY HEADING CLRED FOR TKOF RWY 1.' AS WE WERE XING THE HOLD SHORT LINE (THE FIRST TIME WE COULD SEE FINAL) I OBSERVED A B737 ON A 1-2 NM FINAL (I ESTIMATE) AND SIMULTANEOUSLY HEARD THIS XMISSION 'TWR CONFIRM COMPANY NUMBER (UNSURE OF ACTUAL CALL SIGN) IS CLRED TO LAND.' AT THIS POINT OUR ACFT WAS NEARLY STOPPED ALTHOUGH WE WERE A GOOD 20 FT OVER THE HOLD SHORT LINE. TWR RESPONDED 'COMPANY NUMBER GO AROUND.' AT THIS POINT THE ACFT ACKNOWLEDGED 'COMPANY NUMBER GO AROUND.' SINCE OUR TKOF CLRNC HAD NOT BEEN CANCELED AND A CONFLICT NO LONGER EXISTED; WE COMMENCED THE TKOF ROLL. NO FURTHER COMMENT OR CLARIFICATION WAS RECEIVED FROM MSY TWR. I DO NOT CONSIDER THIS TO HAVE BEEN A DANGEROUS SIT; SINCE WE COULD HAVE CLRED THE RWY WELL BEFORE THE ACFT ON FINAL LANDED. HOWEVER; IT WAS DEFINITELY A BREECH OF SAFETY AND COULD HAVE BEEN DISASTROUS HAD WE NOT SEEN THE ACFT ON FINAL AND HAD THEY NOT NOTICED US AND/OR QUESTIONED THEIR LNDG CLRNC. I HAVE ALWAYS MADE IT MY HABIT TO CHK FINAL BEFORE TAKING THE RWY. THIS INCIDENT WILL REINFORCE THAT HABIT.