Crossword Genius

Fool Louis Armstrong forgetting a finale for trumpet! (5)

Ross

I believe the answer is:

schmo

I'm a little stuck... Click here to teach me more about this clue!

'fool' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for schmo that I've seen before include "jerk" , "clot" , "Fool (Yiddish)" , "Inept person (US_informal)" , "Boring American" .)

I've seen this clue in The Telegraph.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.