Law enforcers around Iran rebuilt Muslim tower (7)
I believe the answer is:
minaret
'muslim tower' is the definition.
(tower on a mosque)
'law enforcers around iran rebuilt' is the wordplay.
'law enforcers' becomes 'Met' (Metropolitan Police Service).
'around' indicates putting letters inside.
'rebuilt' is an anagram indicator.
'iran' anagrammed gives 'inar'.
'met' placed around 'inar' is 'MINARET'.
(Other definitions for minaret that I've seen before include "Tower from which muezzin calls Muslims to prayer" , "religious tower" , "Slender mosque tower" , "Slim tower of a mosque" , "tower in the Middle East" .)