Molasses produced by cartel out east (7)
I believe the answer is:
treacle
'molasses' is the definition.
(I've seen this in another clue)
'by cartel out east' is the wordplay.
'by' says to put letters next to each other.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'east' becomes 'e' (abbreviation).
'cartel' anagrammed gives 'treacl'.
'treacl' put next to 'e' is 'TREACLE'.
'produced' is the link.
(Other definitions for treacle that I've seen before include "Sticky fluid" , "Sweet, black viscous substance" , "Thick, sticky, dark syrup" , "Syrup-like substance" , "Dark viscous 11" .)