Live in sweet tower (7)
I believe the answer is:
minaret
'tower' is the definition.
(minaret is a kind of tower)
'live in sweet' is the wordplay.
'live' becomes 'are' (both can mean exist).
'in' indicates putting letters inside.
'sweet' becomes 'mint' (mint is a kind of sweet**).
'are' placed within 'mint' is 'MINARET'.
(Other definitions for minaret that I've seen before include "Building" , "Tower attached to mosque" , "Mosque's tower" , "religious tower" , "Slim tower of a mosque" .)