Drop out of the conversation? (5)
I believe the answer is:
elide
'drop out of the conversation?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for elide that I've seen before include "Join together, merge" , "Omit (a sound or syllable) when speaking" , "Omit (syllable) in speech" , "Leave out, vowels perhaps" , "Omit (a vowel etc.)" .)