Cheat a score of Romans (6-5)
I believe the answer is:
double-cross
'cheat' is the definition.
(thesaurus)
'a score of romans' is the wordplay.
I cannot really understand how this works, but
an anagram of 'score' is 'ecros' which is located in the answer.
'of' could be 'o' and 'o' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for double-cross that I've seen before include "Deceive person one is supposedly helping" , "Deceive, betray" , "Sell down the river" , "Cheat - betray" , "Deceive supposed ally" .)