Back rents suitably dealt with (5)

I believe the answer is:

stern

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'back' is the definition.
(stern means the back of a boat)

'rents suitably dealt with' is the wordplay.
'rents' anagrams to 'STERN'.
Though, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for stern that I've seen before include "Inflexible; back" , "Rear end" , "Austere rear part of a ship?" , "Hard - back" , "Severe, demanding" .)

I've seen this clue in the Evening Standard.

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