Poet rejected party with Society in it (5)

'poet' is the definition.
(someone writing odes)

'rejected party with society in it' is the wordplay.
'rejected' shows that the letters should be reversed in order.
'party' becomes 'do' (do is a kind of party).
'with' is a charade indicator (letters next to each other).
'society' becomes 's' (common abbreviation in names of organisations).
'in' is an insertion indicator.
'do' back-to-front is 'od'.
's' inserted inside 'it' is 'ist'.
'od'+'ist'='ODIST'