The occasion when a woman goes to the theatre (5)
I believe the answer is:
event
'the occasion' is the definition.
(thesaurus)
'a woman goes to the theatre' is the wordplay.
'a woman' becomes 'eve' (Eve is an example**).
'goes to' is a charade indicator (letters next to each other).
'the theatre' becomes 'nt' (National Theatre).
'eve'+'nt'='EVENT'
'when' acts as a link.
(Other definitions for event that I've seen before include "long jump, say" , "Incident, occurrence" , "special occasion" , "celebration?" , "High jump, say" .)