Singer like this professional keeping a name (7)
I believe the answer is:
Here is my best explanation:
'singer' is the definition.
(soprano is a kind of singer)
'like this professional keeping a name' is the subsidiary indication.
'like this' becomes 'so'.
'professional' becomes 'pro' ('pro' can be a synonym of 'professional'**).
'keeping' means one lot of letters goes inside another.
'name' becomes 'n' (common abbreviation e.g. on forms).
'pro' going around 'an' is 'prano'.
(Other definitions for soprano that I've seen before include "Singer of high notes", "Singing voice", "Adult female voice", "Female singer", "Highest adult female voice", "High singing voice", "Isolde, Violetta or 25", "High female voice", "(Singer of) the highest vocal range" and "Female singing voice".)