Crossword Genius

Thrash although blameless? (3)

Ross

I believe the answer is:

lam

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

'thrash' is the definition.
(both can mean to hit)

'although blameless?' is the wordplay.
'LAM' is hidden in amongst the letters.
But, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for lam that I've seen before include "hurried flight" , "Flee hastily" , "Escape, get away" , "Thrash; (US) escape" , "Batter" .)

I've seen this clue in the Evening Standard.
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