Attempts to organise rites (5)
I believe the answer is:
tries
'attempts' is the definition.
('try' can be a synonym of 'attempt')
'to organise rites' is the wordplay.
'to organise' indicates an anagram (I've seen 'organised' mean this).
'rites' with letters rearranged gives 'TRIES'.
(Other definitions for tries that I've seen before include "Attempts" , "Scoring moves in rugby" .)