American mobster with a high voice? (7)
I believe the answer is:
soprano
I believe this is a double definition.
'american mobster' is the first definition.
(as in the TV show The Sopranos)
'high voice?' is the second definition.
(I've seen this before)
'with a' is the link.
(Other definitions for soprano that I've seen before include "Woman singing" , "Isolde, Violetta or 25" , "Producer of high-pitched sounds" , "gangster" , "High female voice" .)