Singer in small musical work hurried over (7)
I believe the answer is:
soprano
'singer' is the definition.
(I've seen this before)
'small musical work hurried over' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'musical work' becomes 'op' (abbreviation for opus).
'hurried' becomes 'ran' (running is a kind of hurrying).
'over' becomes 'o' (cricket abbreviation**).
's'+'op'+'ran'+'o'='SOPRANO'
'in' is the link.
(Other definitions for soprano that I've seen before include "Singer of high notes" , "Singer who aims high" , "High singing voice" , "Female singer" , "chorus girl, perhaps" .)