Incentive to house one hundred in rundown tenement (10)
I believe the answer is:
enticement
'incentive' is the definition.
(thesaurus)
'house one hundred in rundown tenement' is the wordplay.
I cannot quite see how this works, but
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is found within the answer.
'hundred' could be 'c' (Roman numeral) and 'c' is found in the answer.
This explanation may well be incorrect...
'to' acts as a link.
Can you help me to learn more?
(Other definitions for enticement that I've seen before include "Allure" , "Something alluring" , "Something which tempts" , "Attraction" , "Carrot" .)