Enid managed to sup (4)
I believe the answer is:
dine
'to sup' is the definition.
('dine' can be a synonym of 'sup')
'enid managed' is the wordplay.
'managed' is an anagram indicator.
'enid' anagrammed gives 'DINE'.
(Other definitions for dine that I've seen before include "Eat main meal" , "Eat dinner" , "Have supper" , "Take meal" , "Feed" .)