Are surrounded by much money in the tower (7)
I believe the answer is:
minaret
'tower' is the definition.
(minaret is a kind of tower)
'are surrounded by much money in the' is the wordplay.
'surrounded by' indicates putting letters inside.
'much money' becomes 'm' (abbreviation used in economics. I am not sure about the 'much' bit.).
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'm'+'in'+'t'='mint'
'are' going into 'mint' is 'MINARET'.
Can you help me to learn more?
(Other definitions for minaret that I've seen before include "Slender mosque tower" , "Slender tower with balconies" , "Raiment worn on mosque tower" , "Mosque turret" , "Tower attached to mosque" .)