Run a tug on something sweet (6)
I believe the answer is:
nougat
'something sweet' is the definition.
'run a tug on' is the wordplay.
'run' is an anagram indicator (I've seen this in other clues).
'a'+'tug'+'on'='atugon'
'atugon' anagrammed gives 'NOUGAT'.
(Other definitions for nougat that I've seen before include "Una got (anag) - a chewy sweet" , "Sweet made using honey" , "Chewy confection with nuts, cherries" , "Sweet made from honey, nuts, sugar, etc" , "Chewy almond sweet" .)