Make certain, ignoring right result (5)
I believe the answer is:
ensue
'result' is the definition.
('ensue' can be a synonym of 'result')
'make certain ignoring right' is the wordplay.
'make certain' becomes 'ensure' ('ensure' can be a synonym of 'make certain').
'ignoring' indicates named letters should be taken away.
'right' becomes 'r' (common abbreviation).
'ensure' with 'r' taken away is 'ENSUE'.
(Other definitions for ensue that I've seen before include "Result in a particular way" , "Come about, result in" , "Come along afterwards" , "Transpire" , "Leading directly to" .)