School acquiring oddly neglected Scarlatti score (7)
I believe the answer is:
scratch
'score' is the definition.
(I've seen this before)
'school acquiring oddly neglected scarlatti' is the wordplay.
'school' becomes 'sch'.
'acquiring' means one lot of letters goes inside another.
'oddly neglected' means one should take alternating letters.
The alternate letters of 'scarlatti' are 'crat'.
'sch' placed around 'crat' is 'SCRATCH'.
(Other definitions for scratch that I've seen before include "not much of a handicap" , "Withdraw from (competition)" , "Score a surface" , "cancel > test > money" , "Deal with itch - cancel entry" .)