Hardly Osama's favourite uncle! (3)

I believe the answer is:

sam

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

'uncle' is the definition.
(Uncle Sam is an example)

'hardly osama's favourite' is the wordplay.
'SAM' is hidden within the letters.
But, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for sam that I've seen before include "Boy" , "Casablanca piano player" , "Uncle" , "together once" .)

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.