Crossword Genius

Unwanted, enters for the strong man competition? (7,2)

Ross

I believe the answer is:

muscles in

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

'unwanted enters for the strong' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'man competition?' is the wordplay.
I cannot quite see how this works, but
'man' could be 'les' and 'les' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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