Left to hosts the last word in singing technique (10)
I believe the answer is:
portamento
'singing technique' is the definition.
The definition suggests a singular noun which matches the answer.
'left to hosts the last word' is the wordplay.
'left' becomes 'port' (left side of a ship - opposite of starboard).
'hosts' is an insertion indicator (inserted letters are welcomed or hosted).
'the last word' becomes 'amen' (last word in a prayer).
'port'+'to'='portto'
'portto' enclosing 'amen' is 'PORTAMENTO'.
'in' is the link.
Can you help me to learn more?
(Other definitions for portamento that I've seen before include "smooth transition" , "add notes when gliding" , "glide -- in cantor's style?" , "sliding movement?" , "Style of singing" .)