Young males (4)

I think it could be either:

lads

boys

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

This is all the clue.

(Other definitions for boys that I've seen before include "Beach --, group" , "Male children" , "Young men" , "Young males" , "They will be themselves, it's said" .)

I've seen this clue in The Irish Times and 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.