Electra spattered the syrup (7)
I believe the answer is:
treacle
'syrup' is the definition.
(I know that treacle is a type of syrup)
'electra spattered' is the wordplay.
'spattered' indicates an anagram.
'electra' is an anagram of 'TREACLE'.
'the' acts as a link.
(Other definitions for treacle that I've seen before include "Sticky fluid" , "Viscous liquid" , "Syrup-like substance" , "Sweet, black viscous substance" , "Syrup, molasses" .)