Stop rude sister? Not entirely (6)

I believe the answer is:

desist

'stop' is the definition.
(thesaurus)

'rude sister? not entirely' is the wordplay.
'not entirely' says the answer is hidden in the clue.
'DESIST' is hidden within 'rude sister'.

(Other definitions for desist that I've seen before include "Whoa, cease" , "Abstain, refrain" , "Cease (from doing a thing)" , "Stop, discontinue" , "Stop, abstain" .)

I've seen this clue in The Independent.

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