Still in use as cash registers (5)

I believe the answer is:

tills

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'cash registers' is the definition.
(I've seen this before)

'still in use' is the wordplay.
'still' can be anagrammed to 'TILLS'.
Though, I'm not sure how the anagram is indicated.

'as' is the link.

Can you help me to learn more?

(Other definitions for tills that I've seen before include "Ploughs land" , "Cash registers" .)

I've seen this clue in the Evening Standard.

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