Writes a score, say, though it's almost not a test! (7)
I believe the answer is:
notates
'writes a score say though' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'almost not a test' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'not'+'a'+'test'='notatest'
'notatest' with its final letter taken off is 'NOTATES'.
'it's' is the link.
Can you help me to learn more?
(Other definitions for notates that I've seen before include "records" , "writes music" , "Writes, eg, musical symbols" .)