Not stopping you getting an income from your property (7)

I believe the answer is:

letting

I'm a little stuck... Click here to teach me more about this clue!

'property' is the definition.
(I know that letting is a type of property)

I don't understand the rest of the clue.

(Other definitions for letting that I've seen before include "property for temporary occupants?" , "activity in the property market" , "Allowing or leasing" , "Giving permission to" , "Renting out; allowing" .)

I've seen this clue in the Evening Standard.

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