Discuss when speech has finished (4,4)
I believe the answer is:
talk over
'discuss' is the definition.
(I know that discuss can be written as talk over)
'speech has finished' is the wordplay.
'speech' becomes 'talk' (talk is a kind of speech).
'has' says to put letters next to each other.
'finished' becomes 'over' (similar in meaning).
'talk'+'over'='TALK OVER'
'when' acts as a link.
(Other definitions for talk over that I've seen before include "Discuss" , "Consider together - persuade" .)