Maintain twin sister's lodging (6)

I believe the answer is:

insist

'maintain' is the definition.
(maintain can mean to insist something is true)

'twin sister's lodging' is the wordplay.
'lodging' indicates a hidden word (the clue provides a lodging for the answer ).
'INSIST' is hidden within 'twin sisters'.

(Other definitions for insist that I've seen before include "Persist in pressing" , "Maintain persistently" , "Beg persistently and urgently" , "Put one's foot down" , "Take a firm stand" .)

I've seen this clue in The Independent.

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