Later an imam will go back to lock up tower (7)
I believe the answer is:
minaret
'tower' is the definition.
(I know that minaret is a type of tower)
'later an imam will go back to lock up' is the wordplay.
'MINARET' is hidden backwards in amongst the letters.
But, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for minaret that I've seen before include "Appropriate raiment for mosque tower" , "Building" , "Slim tower of a mosque" , "tower in Istanbul, say" , "Mosque's tower" .)