Whitehall stage success? (3)

I believe the answer is:

hit

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

'stage success?' is the definition.
(I've seen this in another clue)

'whitehall' is the wordplay.
'HIT' is hidden in amongst the letters.
But, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for hit that I've seen before include "Sock" , "Murder" , "skier, perhaps" , "Visit to website" , "Adversely affected" .)

I've seen this clue in the Evening Standard.

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