Don't open purse after dance club conversation (9)
I believe the answer is:
discourse
'conversation' is the definition.
(I've seen this before)
'don't open purse after dance club' is the wordplay.
'don't open' means to remove the first letter (the letter which opens the word is removed).
'after' means one lot of letters go next to another.
'dance club' becomes 'disco' (I've seen this before).
'purse' with its initial letter taken away is 'urse'.
'urse' after 'disco' is 'DISCOURSE'.
(Other definitions for discourse that I've seen before include "Written or spoken communication" , "To hold a conversation" , "(Formal) talk" , "Conversation, dialogue" , "Engage in conversation; debate" .)