Seen on TV, they provide details of Ashes scores (4,5)
I believe the answer is:
test cards
'seen on tv' is the definition.
(a test card is shown on TV between transmissions)
I don't understand the rest of the clue.
(Other definitions for test cards that I've seen before include "on which cricket scores?" , "shown on TV for people tuning in" , "TV images" .)