Opening for Surrey, vital to get on this? (10)
I believe the answer is:
Here is my best explanation:
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'opening for surrey vital to get on' is the wordplay.
'opening for' suggests taking the first letters.
'vital' becomes 'core'.
'to get on' becomes 'board' ('board' can be a synonym of 'get on').
The first letter of 'surrey' is 's'.
(Other definitions for scoreboard that I've seen before include "Where match results are displayed", "It should feature up-to-date numbers", "It shows state of game", "It has information about the competition", "On which points are tallied" and "Indicator of the state of play".)