Host introducing song with welcome for musician (8)
I believe the answer is:
mariachi
'musician' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?
'host introducing song with welcome' is the wordplay.
'host' becomes 'mc' (short for Master of Ceremonies).
'introducing' means one lot of letters goes inside another (some letters introduced or inserted into others).
'song with' becomes 'aria' (I can't justify this - if you can you should believe this answer much more).
'welcome' becomes 'hi' (both are greetings).
'mc' enclosing 'aria' is 'mariac'.
'mariac'+'hi'='MARIACHI'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for mariachi that I've seen before include "Traditional Mexican folk music" , "Mexican players" , "Source of Mexican music" , "Mexican folk music style" , "one who performs music" .)