Score's ultimately showing it? (6)
I believe the answer is:
result
'it?' is the definition.
I can't judge whether this defines the answer.
'score's ultimately showing' is the wordplay.
'showing' indicates the answer is hidden within the clue (the answer is shown in the clue).
'RESULT' is hidden within 'scores ultimately'.
Can you help me to learn more?
(Other definitions for result that I've seen before include "'Outcome, consequence (6)'" , "Effect - outcome" , "Consequence or effect" , "Final score" , "Rustle (anag.)" .)