Associate longs for bit of naughtiness in merry promotional event (6,5)
I believe the answer is:
ladies night
'event' is the definition.
(I have seen 'social event' mean 'ladies night' so perhaps 'event' could also mean 'ladies night')
'associate longs for bit of naughtiness in merry promotional' is the wordplay.
I cannot really understand how this works, but
'longs' could be 'dies' (to be dying for something is to long for it) and 'dies' is found in the answer.
'associate' could be 'an' (AN is an example) and 'an' is located in the leftover letters.
The remaining letters 'light' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for ladies night that I've seen is " social event".)