Fragrant resin carried back by regime leaders (5)
I believe the answer is:
elemi
'fragrant resin' is the definition.
(I've seen this before)
'carried back by regime leaders' is the wordplay.
'back by' says the letters should be written backwards.
'carried' indicates a hidden word.
'imele' can be found hidden inside 'regime leaders'.
'imele' back-to-front is 'ELEMI'.
(Other definitions for elemi that I've seen before include "Tree resin; ie, elm (anag.)" , "Resinous stuff" , "aromatic resin" , "Fragrant resin used as incense - Emile (anag)" , "Fragrant substance" .)