Told of destiny in outdoor event (4)
I believe the answer is:
fete
'outdoor event' is the definition.
(I've seen this before)
'told of destiny' is the wordplay.
'told of' shows a homophone (sound like) (I've seen 'told' mean this).
'destiny' becomes 'fate' (synonyms).
'fate' sounds like 'FETE'.
'in' is the link.
(Other definitions for fete that I've seen before include "Holiday festival" , "Lavishly entertain; charity function" , "Outdoor entertainment and sale, often for charity" , "Event held to raise money" , "Charity garden party" .)