Catch up across in Rome. (3)
I believe the answer is:
ten
This clue might be a double definition.
'catch up' is the first definition.
(I've seen this in other clues)
'across in rome' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
Can you help me to learn more?
(Other definitions for ten that I've seen before include "PM's address, Downing St" , "Five times two" , "X-WORD" , "Roman numeral X" , "Cardinal number" .)