Lax misspelling of misers (6)

I believe the answer is:

remiss

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

'misspelling of misers' is the wordplay.
'misers' can be anagrammed to 'REMISS'.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for remiss that I've seen before include "At fault" , "Negligent, lax" , "Negligent like misers" , "'Careless, negligent (6)'" , "Negligent, derelict" .)

I've seen this clue in the Evening Standard.

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