TWR CTLR ISSUED CLRNC FOR ACFT TO CROSS RWY TO WHICH ANOTHER ACFT WAS ON SHORT FINAL. TOO LATE FOR RPTR'S ACFT TO COMPLY; CTLR ISSUED CLRNC TO HOLD SHORT. ACFT ON FINAL; AT CTLR'S DIRECTION; DID A GAR.

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I TAXIED OUR DC10-10 VIA THE VIOLET RTE TO HOLD IN THE PAD SHORT OF TXWY N ON TXWY L; IN ACCORDANCE WITH GND CTL CLRNC; TO AWAIT ATC RELEASE TO ORD. WE WERE TOLD TO EXPECT DEP ON RWY 5L; WHICH WE HAD PLANNED FOR. THE PAD WAS BARELY BIG ENOUGH FOR A DC10 BUT THE RTE ALONG TXWY K ALLOWED ME TO KNOW THAT I WAS THE ONLY WDB ACFT MOVING IN THAT DIRECTION AT THE TIME AND I ACCEPTED THE CLRNC TO HOLD THERE. GND TOLD US TAXI TO AND HOLD SHORT OF RWY 5R FOR TKOF ON RWY 5L; AND TO SWITCH TO TWR. BECAUSE OF THE NARROW TXWY; I COULDN'T POS THE DC10 ENTIRELY PERPENDICULAR TO THE RWY. I WAS AWARE OF AN RJ INSIDE THE MARKER WITH CLRNC TO LAND ON RWY 5R AND AN ACR X PROP ACFT IN POS FOR TKOF ON RWY 5L. I DID NOT KNOW IF ACR X HAD BEEN GIVEN TKOF CLRNC BEFORE WE SWITCHED TO TWR BUT ASSUMED THAT WHEN TWR CLRED US TO TAXI ACROSS RWY 5R AND 'POS AND HOLD RWY 5L' FO REPEATED CLRNC AND I CALLED FOR 'FINAL' ITEMS ON CHKLIST. AWARE OF THE APCHING ACFT; I ADDED SUFFICIENT PWR TO COMPLETE THE TURN AND CROSS THE RWY EXPEDITIOUSLY. WITH THE NOSE OF MY ACFT ABOUT TO CROSS THE NEAR RWY EDGE LINE ON RWY 5R AND MY ACFT ACCELERATING; I NOTICED THAT ACR A HAD NOT BEGUN TKOF. I XMITTED; 'IS THERE ENOUGH ROOM TO HOLD SHORT FO RWY 5R?' TO GET THE TWR'S AWARENESS OF THE SIT DEVELOPING. THE TWR XMITTED 'ACR Y; HOLD SHORT!' I HAD ALREADY CROSSED THAT LINE AND WAS ENCROACHING THE RWY; ACCELERATING. MY FO SAID 'UNABLE; WE'RE PAST THE LINE' AND I TOLD MY CREW I COULDN'T STOP; WE'RE XING. THE TWR XMITTED 'STOP' BUT MY CONCERN WAS CLRING THE RWY BEFORE THE APCHING ACFT ATTEMPTED TO LAND. I KNEW I COULD ACCOMPLISH THAT SAFELY AND NOT RUN INTO THE ACR X IF THEY DIDN'T START THEIR TKOF ROLL; BUT WAS NOT CONFIDENT THAT THE TWR WOULD ISSUE A GAR; CONSIDERING THE RECENT XMISSIONS INDICATING A LACK OF AWARENESS OF WHAT WAS DEVELOPING. TWR FINALLY ISSUED A GAR TO THE RJ AND A CLRNC; OR RECLRNC TO TKOF FOR OTHER ACFT. THEY COMMENCED TKOF AND WE TAXIED INTO POS AND HELD IN ACCORDANCE WITH LAST CLRNC WE ACCEPTED. THE NEXT XMISSION TO US WAS 'CLRED TO TAKE OFF; HDG XXX;' WITHOUT FURTHER DIALOGUE. THIS STATEMENT WILL BE FORWARDED TO SAFETY AWARENESS PROGRAM WITH RECOMMENDED COMMENTS ABOUT CAUTIONS AND PROCS FOR WDB ACFT TO BE INCLUDED IN CLE ARPT PAGE IN OUR MANUALS.