He's among the trumpeters, having no ability to strum (5)

I believe the answer is:

peter

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

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

'among the trumpeters having no ability to strum' is the wordplay.
'PETER' is hidden within the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for peter that I've seen before include "Apostle - saint - first Pope?" , "Safe; saint" , "Sir - - Ustinov" , "Leading apostle" , "Cephas" .)

I've seen this clue in the Evening Standard.

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.